Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Mastering morphology of non-fullerene acceptors towards long-term stable organic solar cells

Journal Article · · Nature Communications
 [1];  [2];  [3];  [1];  [4];  [1];  [1];  [5];  [6];  [1];  [4];  [4];  [1]
  1. South China Univ. of Technology (SCUT), Guangzhou (China)
  2. South China Univ. of Technology (SCUT), Guangzhou (China); Shanghai Jiao Tong Univ. (China)
  3. South China Institute of Collaborative Innovation, Dongguan (China)
  4. South China Univ. of Technology (SCUT), Guangzhou (China); Pazhou Lab, Guangzhou (China)
  5. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
  6. Shanghai Jiao Tong Univ. (China)
Despite the rapid progress of organic solar cells based on non-fullerene acceptors, simultaneously achieving high power conversion efficiency and long-term stability for commercialization requires sustainable research effort. Here, we demonstrate stable devices by integrating a wide bandgap electron-donating polymer (namely PTzBI-dF) and two acceptors (namely L8BO and Y6) that feature similar structures yet different thermal and morphological properties. The organic solar cell based on PTzBI-dF:L8BO:Y6 could achieve a promising efficiency of 18.26% in the conventional device structure. In the inverted structure, excellent long-term thermal stability over 1400 h under 85 °C continuous heating is obtained. The improved performance can be ascribed to suppressed charge recombination along with appropriate charge transport. We find that the morphological features in terms of crystalline coherence length of fresh and aged films can be gradually regulated by the weight ratio of L8BO:Y6. Additionally, the occurrence of melting point decrease and reduced enthalpy in PTzBI-dF:L8BO:Y6 films could prohibit the amorphous phase to cluster, and consequently overcome the energetic traps accumulation aroused by thermal stress, which is a critical issue in high efficiency non-fullerene acceptors-based devices. This work provides insight into understanding non-fullerene acceptors-based organic solar cells for improved efficiency and stability.
Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
Sponsoring Organization:
Guangdong Basic and Applied Basic Research Foundation; Guangdong Major Project of Basic and Applied Basic Research; National Key Research and Development Program of China; National Natural Science Foundation of China; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
2229342
Journal Information:
Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 14; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

References (59)

Comparison of the Operation of Polymer/Fullerene, Polymer/Polymer, and Polymer/Nanocrystal Solar Cells: A Transient Photocurrent and Photovoltage Study journal March 2011
Quantitative Analysis of Bulk Heterojunction Films Using Linear Absorption Spectroscopy and Solar Cell Performance journal October 2011
Suppressing Co‐Crystallization of Halogenated Non‐Fullerene Acceptors for Thermally Stable Ternary Solar Cells journal October 2020
Layer‐by‐Layer Processed PM6:Y6‐Based Stable Ternary Polymer Solar Cells with Improved Efficiency over 18% by Incorporating an Asymmetric Thieno[3,2‐b]indole‐Based Acceptor journal March 2022
Binary Organic Photovoltaic Blends: A Simple Rationale for Optimum Compositions journal August 2008
Stability of Polymer Solar Cells journal December 2011
A Direct Evidence of Morphological Degradation on a Nanometer Scale in Polymer Solar Cells journal September 2013
Unraveling the Microstructure‐Related Device Stability for Polymer Solar Cells Based on Nonfullerene Small‐Molecular Acceptors journal February 2020
The Role of Demixing and Crystallization Kinetics on the Stability of Non‐Fullerene Organic Solar Cells journal November 2020
Kinetics Manipulation Enables High‐Performance Thick Ternary Organic Solar Cells via R2R‐Compatible Slot‐Die Coating journal January 2022
Decoupling Complex Multi‐Length‐Scale Morphology in Non‐Fullerene Photovoltaics with Nitrogen K‐Edge Resonant Soft X‐ray Scattering journal December 2021
Process‐Aid Solid Engineering Triggers Delicately Modulation of Y‐Series Non‐Fullerene Acceptor for Efficient Organic Solar Cells journal April 2022
Evaluation of Electron Donor Materials for Solution-Processed Organic Solar Cells via a Novel Figure of Merit journal May 2017
Glass Forming Acceptor Alloys for Highly Efficient and Thermally Stable Ternary Organic Solar Cells journal January 2018
Miscibility-Function Relations in Organic Solar Cells: Significance of Optimal Miscibility in Relation to Percolation journal January 2018
What is Killing Organic Photovoltaics: Light‐Induced Crosslinking as a General Degradation Pathway of Organic Conjugated Molecules journal January 2020
Material Strategies to Accelerate OPV Technology Toward a GW Technology journal October 2020
Enabling High Efficiency of Hydrocarbon‐Solvent Processed Organic Solar Cells through Balanced Charge Generation and Non‐Radiative Loss journal October 2021
Oligomer‐Assisted Photoactive Layers Enable >18 % Efficiency of Organic Solar Cells journal March 2022
Understanding the Microstructure Formation of Polymer Films by Spontaneous Solution Spreading Coating with a High‐Throughput Engineering Platform journal July 2021
Understanding the Effect of the Third Component PC 71 BM on Nanoscale Morphology and Photovoltaic Properties of Ternary Organic Solar Cells journal April 2020
High‐Efficiency Sequential‐Cast Organic Solar Cells Enabled by Dual Solvent‐Controlled Polymer Aggregation journal February 2022
Efficient Polymer Solar Cells Based on Non-fullerene Acceptors with Potential Device Lifetime Approaching 10 Years journal January 2019
Single-Junction Organic Solar Cell with over 15% Efficiency Using Fused-Ring Acceptor with Electron-Deficient Core journal April 2019
Elucidating the Full Potential of OPV Materials Utilizing a High-Throughput Robot-Based Platform and Machine Learning journal February 2021
Achieving over 17% efficiency of ternary all-polymer solar cells with two well-compatible polymer acceptors journal June 2021
Industrial viability of single-component organic solar cells journal June 2022
Charge carrier recombination in organic solar cells journal December 2013
18% Efficiency organic solar cells journal February 2020
Simultaneous determination of carrier lifetime and electron density-of-states in P3HT:PCBM organic solar cells under illumination by impedance spectroscopy journal February 2010
Determination of phase diagrams of binary and ternary organic semiconductor blends for organic photovoltaic devices journal December 2011
Capacitance Spectroscopy of Light Induced Trap States in Organic Solar Cells journal September 2016
New Phase for Organic Solar Cell Research: Emergence of Y-Series Electron Acceptors and Their Perspectives journal April 2020
Exploiting Ternary Blends for Improved Photostability in High-Efficiency Organic Solar Cells journal March 2020
Tailoring Regioisomeric Structures of π-Conjugated Polymers Containing Monofluorinated π-Bridges for Highly Efficient Polymer Solar Cells journal May 2020
Toward Improved Environmental Stability of Polymer:Fullerene and Polymer:Nonfullerene Organic Solar Cells: A Common Energetic Origin of Light- and Oxygen-Induced Degradation journal March 2019
Ultrafast Exciton Dissociation Followed by Nongeminate Charge Recombination in PCDTBT:PCBM Photovoltaic Blends journal June 2011
n-Type Water/Alcohol-Soluble Naphthalene Diimide-Based Conjugated Polymers for High-Performance Polymer Solar Cells journal February 2016
Electronic Structure and Transition Energies in Polymer–Fullerene Bulk Heterojunctions journal September 2014
Influence of the Intermediate Density-of-States Occupancy on Open-Circuit Voltage of Bulk Heterojunction Solar Cells with Different Fullerene Acceptors journal August 2010
Polymer Crystallization of Partially Miscible Polythiophene/Fullerene Mixtures Controls Morphology journal July 2011
Temperature Dependence of the Diffusion Coefficient of PCBM in Poly(3-hexylthiophene) journal January 2013
Abnormal strong burn-in degradation of highly efficient polymer solar cells caused by spinodal donor-acceptor demixing journal February 2017
Long-term stable polymer solar cells with significantly reduced burn-in loss journal December 2014
Washing away barriers journal September 2017
Fine-tuning of the chemical structure of photoactive materials for highly efficient organic photovoltaics journal October 2018
Non-fullerene acceptors with branched side chains and improved molecular packing to exceed 18% efficiency in organic solar cells journal May 2021
A molecular interaction–diffusion framework for predicting organic solar cell stability journal January 2021
Single-junction organic solar cells with over 19% efficiency enabled by a refined double-fibril network morphology journal May 2022
High-efficiency organic solar cells with low non-radiative recombination loss and low energetic disorder journal January 2020
Solution-processable metal oxides/chelates as electrode buffer layers for efficient and stable polymer solar cells journal January 2015
Stability of organic solar cells: challenges and strategies journal January 2016
Investigation of the degradation mechanisms of a variety of organic photovoltaic devices by combination of imaging techniques—the ISOS-3 inter-laboratory collaboration journal January 2012
Bimolecular recombination in polymer/fullerene bulk heterojunction solar cells journal January 2006
Physics of organic bulk heterojunction devices for photovoltaic applications journal May 2006
Excitons in conjugated polymers: Wavefunctions, symmetries, and quantum numbers journal October 2008
Determination of defect distributions from admittance measurements and application to Cu(In,Ga)Se 2 based heterojunctions journal October 1996
Soft x-ray scattering facility at the Advanced Light Source with real-time data processing and analysis journal April 2012
Role of Intermolecular Coupling in the Photophysics of Disordered Organic Semiconductors: Aggregate Emission in Regioregular Polythiophene journal May 2007

Similar Records

Air-stable ternary organic solar cells achieved by using fullerene additives in non-fullerene acceptor-polymer donor blends
Journal Article · Tue Feb 14 19:00:00 EST 2023 · Journal of Materials Chemistry C · OSTI ID:2419522

Isomeric Effects of Solution Processed Ladder‐Type Non‐Fullerene Electron Acceptors
Journal Article · Sun Sep 10 20:00:00 EDT 2017 · Solar RRL · OSTI ID:1389094

Role of Crystallization in the Morphology of Polymer: Non-fullerene Acceptor Bulk Heterojunctions
Journal Article · Sun May 21 20:00:00 EDT 2017 · ACS Applied Materials and Interfaces · OSTI ID:1364166

Related Subjects