Green Additive Limits Runaway Crystallinity in PM6:Y6 Organic Solar Cells but Causes Field-Independent Geminate Recombination

Alqahtani, Obaid; Alotaibi, Awwad; Burnes, Michael; Collins, Brian A.

doi:10.1021/acsenergylett.3c01604

Green Additive Limits Runaway Crystallinity in PM6:Y6 Organic Solar Cells but Causes Field-Independent Geminate Recombination

Journal Article · Fri Oct 13 00:00:00 EDT 2023 · ACS Energy Letters

DOI:https://doi.org/10.1021/acsenergylett.3c01604· OSTI ID:2223015

^[1]; Alotaibi, Awwad ^[2]; Burnes, Michael ^[2]; ^[2]

Washington State University, Pullman, WA (United States); Prince Sattam bin Abdulaziz University, Alkharj (Saudia Arabia); Washington State University
Washington State University, Pullman, WA (United States)

Solvent additives are well-established for improving device performance of organic solar cells by enhancing nanodomain phase separation and crystallization. However, optimum additive concentrations are typically at trace amounts with slight fluctuations causing runaway crystallinity that short the device and limit scale-up potential. Furthermore, we show that a nonhalogenated solvent additive 1-phenylnaphthalene (PN) can be used to optimize high-performance PM6:Y6 devices, but without runaway crystallinity even at concentrations 10× above the optimum. Our holistic analysis of device losses shows that PN increases photoabsorption while decreasing bimolecular recombination. However, above the optimum, charge generation is reduced due to field-independent geminate recombination of charge transfer states that overcomes the other benefits. Rotated Y6 crystallite orientation is a likely culprit, where the device electric field is ineffective at separating the charges. Despite this, device performance remains higher than that of traditional additives, indicating a route to avoiding the high sensitivity of performance to processing conditions.

View Accepted Manuscript (DOE)

Research Organization:: Washington State University, Pullman, WA (United States)

Sponsoring Organization:: National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES), Materials Science and Engineering Division (MSE)

Grant/Contract Number:: AC02-05CH11231; SC0017923

OSTI ID:: 2223015

Journal Information:: ACS Energy Letters, Journal Name: ACS Energy Letters Journal Issue: 11 Vol. 8; ISSN 2380-8195

Publisher:: American Chemical Society (ACS)Copyright Statement

Country of Publication:: United States

Language:: English

References (26)

Correlated Donor/Acceptor Crystal Orientation Controls Photocurrent Generation in All-Polymer Solar Cells Schubert, Marcel; Collins, Brian A.; Mangold, Hannah Advanced Functional Materials, Vol. 24, Issue 26 https://doi.org/10.1002/adfm.201304216	journal	April 2014
Accounting for Interference, Scattering, and Electrode Absorption to Make Accurate Internal Quantum Efficiency Measurements in Organic and Other Thin Solar Cells Burkhard, George F.; Hoke, Eric T.; McGehee, Michael D. Advanced Materials, Vol. 22, Issue 30 https://doi.org/10.1002/adma.201000883	journal	May 2010
Barrierless Free Charge Generation in the High‐Performance PM6:Y6 Bulk Heterojunction Non‐Fullerene Solar Cell Perdigón‐Toro, Lorena; Zhang, Huotian; Markina, Anastasia Advanced Materials, Vol. 32, Issue 9 https://doi.org/10.1002/adma.201906763	journal	January 2020
Y‐Type Non‐Fullerene Acceptors with Outer Branched Side Chains and Inner Cyclohexane Side Chains for 19.36% Efficiency Polymer Solar Cells Deng, Min; Xu, Xiaopeng; Duan, Yuwei Advanced Materials, Vol. 35, Issue 10 https://doi.org/10.1002/adma.202210760	journal	January 2023
The Crucial Influence of Fullerene Phases on Photogeneration in Organic Bulk Heterojunction Solar Cells Zusan, Andreas; Vandewal, Koen; Allendorf, Benedikt Advanced Energy Materials, Vol. 4, Issue 17 https://doi.org/10.1002/aenm.201400922	journal	July 2014
The Path to 20% Power Conversion Efficiencies in Nonfullerene Acceptor Organic Solar Cells Karki, Akchheta; Gillett, Alexander J.; Friend, Richard H. Advanced Energy Materials, Vol. 11, Issue 15 https://doi.org/10.1002/aenm.202003441	journal	December 2020
Resonant soft X‐ray scattering in polymer science Collins, Brian A.; Gann, Eliot Journal of Polymer Science https://doi.org/10.1002/pol.20210414	journal	September 2021
High Sensitivity of Non‐Fullerene Organic Solar Cells Morphology and Performance to a Processing Additive Alqahtani, Obaid; Lv, Jie; Xu, Tongle Small, Vol. 18, Issue 23 https://doi.org/10.1002/smll.202202411	journal	May 2022
Environmentally-friendly solvent processed fullerene-free organic solar cells enabled by screening halogen-free solvent additives Zhao, Wenchao; Ye, Long; Li, Sunsun Science China Materials, Vol. 60, Issue 8 https://doi.org/10.1007/s40843-017-9080-x	journal	August 2017
The evolution of small molecular acceptors for organic solar cells: Advances, challenges and prospects Liang, Xin; Wang, Jiuxing; Miao, Run Dyes and Pigments, Vol. 198 https://doi.org/10.1016/j.dyepig.2021.109963	journal	February 2022
Single-Junction Organic Solar Cell with over 15% Efficiency Using Fused-Ring Acceptor with Electron-Deficient Core Yuan, Jun; Zhang, Yunqiang; Zhou, Liuyang Joule, Vol. 3, Issue 4 https://doi.org/10.1016/j.joule.2019.01.004	journal	April 2019
Electrical edge effect induced photocurrent overestimation in low-light organic photovoltaics Zhou, Xiaobo; Zhao, Chao; Alotaibi, Awwad Nasser Joule, Vol. 6, Issue 8 https://doi.org/10.1016/j.joule.2022.06.008	journal	August 2022
Enhanced efficiency in nonfullerene organic solar cells by tuning molecular order and domain characteristics Ye, Long; Xiong, Yuan; Zhang, Maojie Nano Energy, Vol. 77 https://doi.org/10.1016/j.nanoen.2020.105310	journal	November 2020
Evidence for Field-Dependent Charge Separation Caused by Mixed Phases in Polymer–Fullerene Organic Solar Cells Dhakal, Prabodh; Ferron, Thomas; Alotaibi, Awwad The Journal of Physical Chemistry Letters, Vol. 12, Issue 7 https://doi.org/10.1021/acs.jpclett.0c03863	journal	February 2021
Entropy and Disorder Enable Charge Separation in Organic Solar Cells Hood, Samantha N.; Kassal, Ivan The Journal of Physical Chemistry Letters, Vol. 7, Issue 22 https://doi.org/10.1021/acs.jpclett.6b02178	journal	October 2016
Excitons Dominate the Emission from PM6:Y6 Solar Cells, but This Does Not Help the Open-Circuit Voltage of the Device Perdigón-Toro, Lorena; Phuong, Le Quang; Zeiske, Stefan ACS Energy Letters, Vol. 6, Issue 2 https://doi.org/10.1021/acsenergylett.0c02572	journal	January 2021
High Exciton Diffusion Coefficients in Fused Ring Electron Acceptor Films Chandrabose, Sreelakshmi; Chen, Kai; Barker, Alex J. Journal of the American Chemical Society, Vol. 141, Issue 17 https://doi.org/10.1021/jacs.8b12982	journal	April 2019
Efficient organic solar cells processed from hydrocarbon solvents Zhao, Jingbo; Li, Yunke; Yang, Guofang Nature Energy, Vol. 1, Issue 2 https://doi.org/10.1038/nenergy.2015.27	journal	January 2016
Efficient charge generation by relaxed charge-transfer states at organic interfaces Vandewal, Koen; Albrecht, Steve; Hoke, Eric T. Nature Materials, Vol. 13, Issue 1 https://doi.org/10.1038/nmat3807	journal	November 2013
The influence of molecular orientation on organic bulk heterojunction solar cells Tumbleston, John R.; Collins, Brian A.; Yang, Liqiang Nature Photonics, Vol. 8, Issue 5 https://doi.org/10.1038/nphoton.2014.55	journal	April 2014
Delocalization of exciton and electron wavefunction in non-fullerene acceptor molecules enables efficient organic solar cells Zhang, Guichuan; Chen, Xian-Kai; Xiao, Jingyang Nature Communications, Vol. 11, Issue 1 https://doi.org/10.1038/s41467-020-17867-1	journal	August 2020
Non-fullerene acceptors with branched side chains and improved molecular packing to exceed 18% efficiency in organic solar cells Li, Chao; Zhou, Jiadong; Song, Jiali Nature Energy, Vol. 6, Issue 6 https://doi.org/10.1038/s41560-021-00820-x	journal	May 2021
Increased charge transfer state separation via reduced mixed phase interface in polymer solar cells Ferron, Thomas; Waldrip, Matthew; Pope, Michael Journal of Materials Chemistry A, Vol. 7, Issue 9 https://doi.org/10.1039/C8TA12336E	journal	January 2019
Additive-induced miscibility regulation and hierarchical morphology enable 17.5% binary organic solar cells Lv, Jie; Tang, Hua; Huang, Jiaming Energy & Environmental Science, Vol. 14, Issue 5 https://doi.org/10.1039/D0EE04012F	journal	January 2021
Progress and prospects of the morphology of non-fullerene acceptor based high-efficiency organic solar cells Zhu, Lei; Zhang, Ming; Zhong, Wenkai Energy & Environmental Science, Vol. 14, Issue 8 https://doi.org/10.1039/D1EE01220G	journal	January 2021
Recent advances in PM6:Y6-based organic solar cells Guo, Qing; Guo, Qiang; Geng, Yanfang Materials Chemistry Frontiers, Vol. 5, Issue 8 https://doi.org/10.1039/D1QM00060H	journal	January 2021

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14 SOLAR ENERGY
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Resonant soft x-ray scattering

Green Additive Limits Runaway Crystallinity in PM6:Y6 Organic Solar Cells but Causes Field-Independent Geminate Recombination

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