High‐Efficiency Nonfullerene Organic Solar Cells: Critical Factors that Affect Complex Multi‐Length Scale Morphology and Device Performance
Abstract
Organic solar cells (OSCs) made of donor/acceptor bulk‐heterojunction active layers have been of widespread interest in converting sunlight to electricity. Characterizing of the complex morphology at multiple length scales of polymer:nonfullerene small molecular acceptor (SMA) systems remains largely unexplored. Through detailed characterizations (hard/soft X‐ray scattering) of the record‐efficiency polymer:SMA system with a close analog, quantitative morphological parameters are related to the device performance parameters and fundamental morphology–performance relationships that explain why additive use and thermal annealing are needed for optimized performance are established. A linear correlation between the average purity variations at small length scale (≈10 nm) and photovoltaic device characteristics across all processing protocols is observed in ≈12%‐efficiency polymer:SMA systems. In addition, molecular interactions as reflected by the estimated Flory–Huggins interaction parameters are used to provide context of the room temperature morphology results. Comparison with results from annealed devices suggests that the two SMA systems compared show upper and lower critical solution temperature behavior, respectively. The in‐depth understanding of the complex multilength scale nonfullerene OSC morphology may guide the device optimization and new materials development and indicates that thermodynamic properties of materials systems should be studied in more detail to aid in designing optimized protocols efficiently.
- Authors:
-
- Department of Physics and Organic and Carbon Electronics Lab (ORaCEL) North Carolina State University Raleigh NC 27695 USA
- State Key Laboratory of Polymer Physics and Chemistry Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
- Publication Date:
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1392183
- Grant/Contract Number:
- DE‐AC02‐05CH11231
- Resource Type:
- Publisher's Accepted Manuscript
- Journal Name:
- Advanced Energy Materials
- Additional Journal Information:
- Journal Name: Advanced Energy Materials Journal Volume: 7 Journal Issue: 7; Journal ID: ISSN 1614-6832
- Publisher:
- Wiley Blackwell (John Wiley & Sons)
- Country of Publication:
- Germany
- Language:
- English
Citation Formats
Ye, Long, Zhao, Wenchao, Li, Sunsun, Mukherjee, Subhrangsu, Carpenter, Joshua H., Awartani, Omar, Jiao, Xuechen, Hou, Jianhui, and Ade, Harald. High‐Efficiency Nonfullerene Organic Solar Cells: Critical Factors that Affect Complex Multi‐Length Scale Morphology and Device Performance. Germany: N. p., 2016.
Web. doi:10.1002/aenm.201602000.
Ye, Long, Zhao, Wenchao, Li, Sunsun, Mukherjee, Subhrangsu, Carpenter, Joshua H., Awartani, Omar, Jiao, Xuechen, Hou, Jianhui, & Ade, Harald. High‐Efficiency Nonfullerene Organic Solar Cells: Critical Factors that Affect Complex Multi‐Length Scale Morphology and Device Performance. Germany. https://doi.org/10.1002/aenm.201602000
Ye, Long, Zhao, Wenchao, Li, Sunsun, Mukherjee, Subhrangsu, Carpenter, Joshua H., Awartani, Omar, Jiao, Xuechen, Hou, Jianhui, and Ade, Harald. Mon .
"High‐Efficiency Nonfullerene Organic Solar Cells: Critical Factors that Affect Complex Multi‐Length Scale Morphology and Device Performance". Germany. https://doi.org/10.1002/aenm.201602000.
@article{osti_1392183,
title = {High‐Efficiency Nonfullerene Organic Solar Cells: Critical Factors that Affect Complex Multi‐Length Scale Morphology and Device Performance},
author = {Ye, Long and Zhao, Wenchao and Li, Sunsun and Mukherjee, Subhrangsu and Carpenter, Joshua H. and Awartani, Omar and Jiao, Xuechen and Hou, Jianhui and Ade, Harald},
abstractNote = {Organic solar cells (OSCs) made of donor/acceptor bulk‐heterojunction active layers have been of widespread interest in converting sunlight to electricity. Characterizing of the complex morphology at multiple length scales of polymer:nonfullerene small molecular acceptor (SMA) systems remains largely unexplored. Through detailed characterizations (hard/soft X‐ray scattering) of the record‐efficiency polymer:SMA system with a close analog, quantitative morphological parameters are related to the device performance parameters and fundamental morphology–performance relationships that explain why additive use and thermal annealing are needed for optimized performance are established. A linear correlation between the average purity variations at small length scale (≈10 nm) and photovoltaic device characteristics across all processing protocols is observed in ≈12%‐efficiency polymer:SMA systems. In addition, molecular interactions as reflected by the estimated Flory–Huggins interaction parameters are used to provide context of the room temperature morphology results. Comparison with results from annealed devices suggests that the two SMA systems compared show upper and lower critical solution temperature behavior, respectively. The in‐depth understanding of the complex multilength scale nonfullerene OSC morphology may guide the device optimization and new materials development and indicates that thermodynamic properties of materials systems should be studied in more detail to aid in designing optimized protocols efficiently.},
doi = {10.1002/aenm.201602000},
journal = {Advanced Energy Materials},
number = 7,
volume = 7,
place = {Germany},
year = {Mon Dec 12 00:00:00 EST 2016},
month = {Mon Dec 12 00:00:00 EST 2016}
}
https://doi.org/10.1002/aenm.201602000
Web of Science
Works referenced in this record:
Charge Creation and Recombination in Multi-Length Scale Polymer:Fullerene BHJ Solar Cell Morphologies
journal, June 2016
- Mukherjee, Subhrangsu; Jiao, Xuechen; Ade, Harald
- Advanced Energy Materials, Vol. 6, Issue 18
High-Performance Electron Acceptor with Thienyl Side Chains for Organic Photovoltaics
journal, March 2016
- Lin, Yuze; Zhao, Fuwen; He, Qiao
- Journal of the American Chemical Society, Vol. 138, Issue 14
A High Efficiency Nonfullerene Organic Solar Cell with Optimized Crystalline Organizations
journal, December 2015
- Kwon, Oh Kyu; Uddin, Mohammad Afsar; Park, Jung-Hwa
- Advanced Materials, Vol. 28, Issue 5
Hierarchical Nanomorphologies Promote Exciton Dissociation in Polymer/Fullerene Bulk Heterojunction Solar Cells
journal, September 2011
- Chen, Wei; Xu, Tao; He, Feng
- Nano Letters, Vol. 11, Issue 9, p. 3707-3713
Fast charge separation in a non-fullerene organic solar cell with a small driving force
journal, June 2016
- Liu, Jing; Chen, Shangshang; Qian, Deping
- Nature Energy, Vol. 1, Issue 7
Non-fullerene polymer solar cells based on a selenophene-containing fused-ring acceptor with photovoltaic performance of 8.6%
journal, January 2016
- Li, Yongxi; Zhong, Lian; Wu, Fu-Peng
- Energy & Environmental Science, Vol. 9, Issue 11
Interferometer-controlled scanning transmission X-ray microscopes at the Advanced Light Source
journal, February 2003
- Kilcoyne, A. L. D.; Tyliszczak, T.; Steele, W. F.
- Journal of Synchrotron Radiation, Vol. 10, Issue 2
High-Performance Solution-Processed Non-Fullerene Organic Solar Cells Based on Selenophene-Containing Perylene Bisimide Acceptor
journal, December 2015
- Meng, Dong; Sun, Dan; Zhong, Chengmei
- Journal of the American Chemical Society, Vol. 138, Issue 1
A Rhodanine Flanked Nonfullerene Acceptor for Solution-Processed Organic Photovoltaics
journal, January 2015
- Holliday, Sarah; Ashraf, Raja Shahid; Nielsen, Christian B.
- Journal of the American Chemical Society, Vol. 137, Issue 2
High-efficiency and air-stable P3HT-based polymer solar cells with a new non-fullerene acceptor
journal, June 2016
- Holliday, Sarah; Ashraf, Raja Shahid; Wadsworth, Andrew
- Nature Communications, Vol. 7, Issue 1
Vertical Phase Separation in Small Molecule:Polymer Blend Organic Thin Film Transistors Can Be Dynamically Controlled
journal, February 2016
- Zhao, Kui; Wodo, Olga; Ren, Dingding
- Advanced Functional Materials, Vol. 26, Issue 11
Characterizing morphology in organic systems with resonant soft X-ray scattering
journal, April 2015
- Carpenter, Joshua H.; Hunt, Adrian; Ade, Harald
- Journal of Electron Spectroscopy and Related Phenomena, Vol. 200
Soft x-ray scattering facility at the Advanced Light Source with real-time data processing and analysis
journal, April 2012
- Gann, E.; Young, A. T.; Collins, B. A.
- Review of Scientific Instruments, Vol. 83, Issue 4
A SAXS/WAXS/GISAXS Beamline with Multilayer Monochromator
journal, October 2010
- Hexemer, Alexander; Bras, Wim; Glossinger, James
- Journal of Physics: Conference Series, Vol. 247
Nanomorphology of Bulk Heterojunction Photovoltaic Thin Films Probed with Resonant Soft X-ray Scattering
journal, August 2010
- Swaraj, Sufal; Wang, Cheng; Yan, Hongping
- Nano Letters, Vol. 10, Issue 8
Rigidifying Nonplanar Perylene Diimides by Ring Fusion Toward Geometry-Tunable Acceptors for High-Performance Fullerene-Free Solar Cells
journal, December 2015
- Zhong, Hongliang; Wu, Chen-Hao; Li, Chang-Zhi
- Advanced Materials, Vol. 28, Issue 5
More than Conformational “Twisting” or “Coplanarity”: Molecular Strategies for Designing High-Efficiency Nonfullerene Organic Solar Cells
journal, March 2016
- Zhan, Chuanlang; Yao, Jiannian
- Chemistry of Materials, Vol. 28, Issue 7
Toward reliable and accurate evaluation of polymer solar cells based on low band gap polymers
journal, January 2015
- Ye, Long; Zhou, Chengyue; Meng, Haifeng
- Journal of Materials Chemistry C, Vol. 3, Issue 3
High-Efficiency Nonfullerene Polymer Solar Cells with Medium Bandgap Polymer Donor and Narrow Bandgap Organic Semiconductor Acceptor
journal, July 2016
- Gao, Liang; Zhang, Zhi-Guo; Bin, Haijun
- Advanced Materials, Vol. 28, Issue 37
Small Molecule/Polymer Blend Organic Transistors with Hole Mobility Exceeding 13 cm 2 V −1 s −1
journal, July 2016
- Paterson, Alexandra F.; Treat, Neil D.; Zhang, Weimin
- Advanced Materials, Vol. 28, Issue 35
Key components to the recent performance increases of solution processed non-fullerene small molecule acceptors
journal, January 2015
- McAfee, Seth M.; Topple, Jessica M.; Hill, Ian G.
- Journal of Materials Chemistry A, Vol. 3, Issue 32
An Electron Acceptor Challenging Fullerenes for Efficient Polymer Solar Cells
journal, January 2015
- Lin, Yuze; Wang, Jiayu; Zhang, Zhi-Guo
- Advanced Materials, Vol. 27, Issue 7
In Situ Morphology Studies of the Mechanism for Solution Additive Effects on the Formation of Bulk Heterojunction Films
journal, September 2014
- Richter, Lee J.; DeLongchamp, Dean M.; Bokel, Felicia A.
- Advanced Energy Materials, Vol. 5, Issue 3
Efficient organic solar cells processed from hydrocarbon solvents
journal, January 2016
- Zhao, Jingbo; Li, Yunke; Yang, Guofang
- Nature Energy, Vol. 1, Issue 2
Highly Efficient Organic Solar Cells with Improved Vertical Donor-Acceptor Compositional Gradient Via an Inverted Off-Center Spinning Method
journal, December 2015
- Huang, Jiang; Carpenter, Joshua H.; Li, Chang-Zhi
- Advanced Materials, Vol. 28, Issue 5
Nonfullerene Polymer Solar Cells with 8.5% Efficiency Enabled by a New Highly Twisted Electron Acceptor Dimer
journal, October 2015
- Hwang, Ye-Jin; Li, Haiyan; Courtright, Brett A. E.
- Advanced Materials, Vol. 28, Issue 1
Breaking the 10% Efficiency Barrier in Organic Photovoltaics: Morphology and Device Optimization of Well-Known PBDTTT Polymers
journal, March 2016
- Zhang, Shaoqing; Ye, Long; Hou, Jianhui
- Advanced Energy Materials, Vol. 6, Issue 11
Mobility-Controlled Performance of Thick Solar Cells Based on Fluorinated Copolymers
journal, October 2014
- Li, Wentao; Albrecht, Steve; Yang, Liqiang
- Journal of the American Chemical Society, Vol. 136, Issue 44
Small-angle X-ray study of particulate reinforced composites
journal, December 1982
- Wu, Wen-li
- Polymer, Vol. 23, Issue 13
Enhanced Efficiency in Fullerene-Free Polymer Solar Cell by Incorporating Fine-designed Donor and Acceptor Materials
journal, April 2015
- Ye, Long; Sun, Kai; Jiang, Wei
- ACS Applied Materials & Interfaces, Vol. 7, Issue 17
Polymer Crystallization of Partially Miscible Polythiophene/Fullerene Mixtures Controls Morphology
journal, July 2011
- Kozub, Derek R.; Vakhshouri, Kiarash; Orme, Lisa M.
- Macromolecules, Vol. 44, Issue 14
Fullerene Additives Convert Ambipolar Transport to p-Type Transport while Improving the Operational Stability of Organic Thin Film Transistors
journal, May 2016
- Ford, Michael J.; Wang, Ming; Phan, Hung
- Advanced Functional Materials, Vol. 26, Issue 25
Non-Fullerene Electron Acceptors for Use in Organic Solar Cells
journal, October 2015
- Nielsen, Christian B.; Holliday, Sarah; Chen, Hung-Yang
- Accounts of Chemical Research, Vol. 48, Issue 11
Manipulation of Domain Purity and Orientational Ordering in High Performance All-Polymer Solar Cells
journal, August 2016
- Ye, Long; Jiao, Xuechen; Zhao, Wenchao
- Chemistry of Materials, Vol. 28, Issue 17
Molecular helices as electron acceptors in high-performance bulk heterojunction solar cells
journal, September 2015
- Zhong, Yu; Trinh, M. Tuan; Chen, Rongsheng
- Nature Communications, Vol. 6, Issue 1
Beyond Fullerenes: Designing Alternative Molecular Electron Acceptors for Solution-Processable Bulk Heterojunction Organic Photovoltaics
journal, August 2015
- Sauvé, Geneviève; Fernando, Roshan
- The Journal of Physical Chemistry Letters, Vol. 6, Issue 18
Three-Bladed Rylene Propellers with Three-Dimensional Network Assembly for Organic Electronics
journal, August 2016
- Meng, Dong; Fu, Huiting; Xiao, Chengyi
- Journal of the American Chemical Society, Vol. 138, Issue 32
Ultrafast Long-Range Charge Separation in Organic Semiconductor Photovoltaic Diodes
journal, December 2013
- Gelinas, S.; Rao, A.; Kumar, A.
- Science, Vol. 343, Issue 6170
Energy-Level Modulation of Small-Molecule Electron Acceptors to Achieve over 12% Efficiency in Polymer Solar Cells
journal, September 2016
- Li, Sunsun; Ye, Long; Zhao, Wenchao
- Advanced Materials, Vol. 28, Issue 42
Nika : software for two-dimensional data reduction
journal, March 2012
- Ilavsky, Jan
- Journal of Applied Crystallography, Vol. 45, Issue 2
Polymer-Fullerene Miscibility: A Metric for Screening New Materials for High-Performance Organic Solar Cells
journal, September 2012
- Treat, Neil D.; Varotto, Alessandro; Takacs, Christopher J.
- Journal of the American Chemical Society, Vol. 134, Issue 38
Dynamics, Miscibility, and Morphology in Polymer:Molecule Blends: The Impact of Chemical Functionality
journal, November 2015
- Do, Khanh; Risko, Chad; Anthony, John E.
- Chemistry of Materials, Vol. 27, Issue 22
Non-fullerene acceptors for organic photovoltaics: an emerging horizon
journal, January 2014
- Lin, Yuze; Zhan, Xiaowei
- Materials Horizons, Vol. 1, Issue 5
Importance of Domain Purity and Molecular Packing in Efficient Solution-Processed Small-Molecule Solar Cells
journal, December 2014
- Mukherjee, Subhrangsu; Proctor, Christopher M.; Tumbleston, John R.
- Advanced Materials, Vol. 27, Issue 6
Structure and Properties of Small Molecule−Polymer Blend Semiconductors for Organic Thin Film Transistors
journal, September 2008
- Kang, Jihoon; Shin, Nayool; Jang, Do Young
- Journal of the American Chemical Society, Vol. 130, Issue 37
Side-Chain Tunability of Furan-Containing Low-Band-Gap Polymers Provides Control of Structural Order in Efficient Solar Cells
journal, January 2012
- Yiu, Alan T.; Beaujuge, Pierre M.; Lee, Olivia P.
- Journal of the American Chemical Society, Vol. 134, Issue 4
Solution-Processed Small Molecule-Polymer Blend Organic Thin-Film Transistors with Hole Mobility Greater than 5 cm2/Vs
journal, April 2012
- Smith, Jeremy; Zhang, Weimin; Sougrat, Rachid
- Advanced Materials, Vol. 24, Issue 18
Manipulating Aggregation and Molecular Orientation in All-Polymer Photovoltaic Cells
journal, August 2015
- Ye, Long; Jiao, Xuechen; Zhou, Meng
- Advanced Materials, Vol. 27, Issue 39
Significance of Average Domain Purity and Mixed Domains on the Photovoltaic Performance of High-Efficiency Solution-Processed Small-Molecule BHJ Solar Cells
journal, July 2015
- Mukherjee, Subhrangsu; Proctor, Christopher M.; Bazan, Guillermo C.
- Advanced Energy Materials, Vol. 5, Issue 21
In Situ Characterization of Polymer–Fullerene Bilayer Stability
journal, January 2015
- Leman, Deborah; Kelly, Mary Allison; Ness, Stuart
- Macromolecules, Vol. 48, Issue 2
Low Open-Circuit Voltage Loss in Solution-Processed Small-Molecule Organic Solar Cells
journal, June 2016
- Tuladhar, Sachetan M.; Azzouzi, Mohammed; Delval, Florent
- ACS Energy Letters, Vol. 1, Issue 1
Absolute Measurement of Domain Composition and Nanoscale Size Distribution Explains Performance in PTB7:PC 71 BM Solar Cells
journal, October 2012
- Collins, Brian A.; Li, Zhe; Tumbleston, John R.
- Advanced Energy Materials, Vol. 3, Issue 1
High-Performance Polymer-Small Molecule Blend Organic Transistors
journal, March 2009
- Hamilton, Richard; Smith, Jeremy; Ogier, Simon
- Advanced Materials, Vol. 21, Issue 10-11, p. 1166-1171
Selecting a Donor Polymer for Realizing Favorable Morphology in Efficient Non-fullerene Acceptor-based Solar Cells
journal, June 2014
- Ye, Long; Jiang, Wei; Zhao, Wenchao
- Small, Vol. 10, Issue 22
Molecular Miscibility of Polymer−Fullerene Blends
journal, October 2010
- Collins, Brian A.; Gann, Eliot; Guignard, Lewis
- The Journal of Physical Chemistry Letters, Vol. 1, Issue 21
Covalently Bound Clusters of Alpha-Substituted PDI—Rival Electron Acceptors to Fullerene for Organic Solar Cells
journal, June 2016
- Wu, Qinghe; Zhao, Donglin; Schneider, Alexander M.
- Journal of the American Chemical Society, Vol. 138, Issue 23
Low Band Gap Polymer Solar Cells With Minimal Voltage Losses
journal, June 2016
- Wang, Chuanfei; Xu, Xiaofeng; Zhang, Wei
- Advanced Energy Materials, Vol. 6, Issue 18
The relative importance of domain size, domain purity and domain interfaces to the performance of bulk-heterojunction organic photovoltaics
journal, January 2012
- Lyons, Benjamin P.; Clarke, Nigel; Groves, Chris
- Energy & Environmental Science, Vol. 5, Issue 6
From Binary to Ternary Solvent: Morphology Fine-tuning of D/A Blends in PDPP3T-based Polymer Solar Cells
journal, September 2012
- Ye, Long; Zhang, Shaoqing; Ma, Wei
- Advanced Materials, Vol. 24, Issue 47
A Facile Planar Fused-Ring Electron Acceptor for As-Cast Polymer Solar Cells with 8.71% Efficiency
journal, February 2016
- Lin, Yuze; He, Qiao; Zhao, Fuwen
- Journal of the American Chemical Society, Vol. 138, Issue 9
Design, Application, and Morphology Study of a New Photovoltaic Polymer with Strong Aggregation in Solution State
journal, December 2012
- Qian, Deping; Ye, Long; Zhang, Maojie
- Macromolecules, Vol. 45, Issue 24
Non-Fullerene Polymer Solar Cells Based on Alkylthio and Fluorine Substituted 2D-Conjugated Polymers Reach 9.5% Efficiency
journal, March 2016
- Bin, Haijun; Zhang, Zhi-Guo; Gao, Liang
- Journal of the American Chemical Society, Vol. 138, Issue 13
Fullerene-Free Polymer Solar Cells with over 11% Efficiency and Excellent Thermal Stability
journal, April 2016
- Zhao, Wenchao; Qian, Deping; Zhang, Shaoqing
- Advanced Materials, Vol. 28, Issue 23
2D-Conjugated Benzodithiophene-Based Polymer Acceptor: Design, Synthesis, Nanomorphology, and Photovoltaic Performance
journal, September 2015
- Ye, Long; Jiao, Xuechen; Zhang, Hao
- Macromolecules, Vol. 48, Issue 19
On the role of intermixed phases in organic photovoltaic blends
journal, January 2013
- Westacott, Paul; Tumbleston, John R.; Shoaee, Safa
- Energy & Environmental Science, Vol. 6, Issue 9
High-Performance Non-Fullerene Polymer Solar Cells Based on a Pair of Donor-Acceptor Materials with Complementary Absorption Properties
journal, October 2015
- Lin, Haoran; Chen, Shangshang; Li, Zhengke
- Advanced Materials, Vol. 27, Issue 45
How High Local Charge Carrier Mobility and an Energy Cascade in a Three-Phase Bulk Heterojunction Enable >90% Quantum Efficiency
journal, December 2013
- Burke, Timothy M.; McGehee, Michael D.
- Advanced Materials, Vol. 26, Issue 12