• Thermal Diffusion of Fullerene Acceptors Changes Morphology of Planar Heterojunctions

  • Yuri Kim and Tack Ho Lee†

  • Graduate Department of Chemical Materials, Institute for Plastic Information and Energy Materials, Sustainable Utilization of Photovoltaic Energy Research Center, Pusan National University, Busan 46241, Korea

  • 열 어닐링에 의한 풀러렌 유도체 확산에 따른평면 이종접합의 모폴로지 변화

  • 김유리 · 이택호†

  • 부산대학교 화학소재학과

  • Reproduction, stored in a retrieval system, or transmitted in any form of any part of this publication is permitted only by written permission from the Polymer Society of Korea.

References
  • 1. Liu, K.; Jiang, Y.; Ran, G.; Liu, F.; Zhang, W.; Zhu, X. 19.7% Efficiency Binary Organic Solar Cells Achieved by Selective Core Fluorination of Nonfullerene Electron Acceptors Joule 2024, 8, 835-851.
  •  
  • 2. He, X.; Chan, C. C. S.; Zou, X.; Zhang, S.; Fong, P. W. K.; Kim, J.; Li, G.; Hu, X.; Ma, W.; Wong, K. S.; Choy, W. C. H. Modulating the Mixing Gibbs Free Energy to Enhance Solid–Liquid Phase Separation for High-Performance Organic Solar Cells Adv. Energy Mater. 2023, 13, 2203697.
  •  
  • 3. Hu, H.; Ghasemi, M.; Peng, Z.; Zhang, J.; Rech, J. J.; You, W.; Yan, H.; Ade, H. The Role of Demixing and Crystallization Kinetics on the Stability of Non-Fullerene Organic Solar Cells Adv. Mater. 2020, 32, 2005348.
  •  
  • 4. Fu, J.; Yang, Q.; Huang, P.; Chung, S.; Cho, K.; Kan, Z.; Liu, H.; Lu, X.; Lang, Y.; Lai, H.; He, F.; Fong, P. W. K.; Lu, S.; Yang, Y.; Xiao, Z.; Li, G. Rational Molecular and Device Design Enables Organic Solar Cells Approaching 20% Efficiency. Nat. Commun. 2024, 15, 1830.
  •  
  • 5. Kumari, T.; Vyalih, I.; León Luna, M. Á.; Ahmed, H.; Ahmad, M.; Atajanov, R.; Jayaraman, E.; Manikandan, S.; Paci, B.; Di Carlo, A.; Andreasen, J. W.; Turkovic, V.; Madsen, M. Bilayer Layer-by-layer Structures for Enhanced Efficiency and Stability of Organic Photovoltaics Beyond Bulk Heterojunctions. Cell. Rep. Phys. Sci. 2024, 5, 102027.
  •  
  • 6. Zhao, Y.; Wu, Z.; Liu, X.; Zhong, Z.; Zhu, R.; Yu, J. Revealing the Photo-degradation Mechanism of PM6:Y6 Based High-efficiency Organic Solar Cells. J. Mater. Chem. C 2021, 9, 13972-13980.
  •  
  • 7. Liang, Q. B.; Xie, Y.; Wu, H. B. Elucidating the Role of the Heterojunction Interface in the Exciton Harvest and Charge Collection of Organic Solar Cells Through a Planar Heterojunction Structure. J. Mater. Chem. C 2022, 10, 598-606.
  •  
  • 8. Foertig, A.; Wagenpfahl, A.; Gerbich, T.; Cheyns, D.; Dyakonov, V.; Deibel, C. Nongeminate Recombination in Planar and Bulk Heterojunction Organic Solar Cells. Adv. Energy Mater. 2012, 2, 1483-1489.
  •  
  • 9. Kim, T.; Younts, R.; Lee, W.; Lee, S.; Gundogdu, K.; Kim, B. J. Impact of the Photo-induced Degradation of Electron Acceptors on the Photophysics, Charge Transport and Device Performance of All-polymer and Fullerene–polymer Solar Cells. J. Mater. Chem. A 2017, 5, 22170-22179.
  •  
  • 10. Lee, T. H.; Dong, Y.; Pacalaj, R. A.; Park, S. Y.; Xu, W.; Kim, J.-S.; Durrant, J. R. Organic Planar Heterojunction Solar Cells and Photodetectors Tailored to the Exciton Diffusion Length Scale of a Non-Fullerene Acceptor. Adv. Funct. Mater. 2022, 32, 2208001.
  •  
  • 11. Watts, B.; Belcher, W. J.; Thomsen, L.; Ade, H.; Dastoor, P. C. A Quantitative Study of PCBM Diffusion during Annealing of P3HT:PCBM Blend Films. Macromolecules 2009, 42, 8392-8397.
  •  
  • 12. Berriman, G. A.; Holdsworth, J. L.; Zhou, X.; Belcher, W. J.; Dastoor, P. C. Molecular versus crystallite PCBM diffusion in P3HT:PCBM Blends. AIP Adv. 2015, 5, 097220.
  •  
  • 13. Yin, J.; Zhou, W.; Zhang, L.; Xie, Y.; Yu, Z.; Shao, J.; Ma, W.; Zeng, J.; Chen, Y. Improved Glass Transition Temperature towards Thermal Stability via Thiols Solvent Additive versus DIO in Polymer Solar Cells. Macromol. Rapid Commun. 2017, 38, 1700428.
  •  
  • 14. Weng, K.; Ye, L.; Zhu, L.; Xu, J.; Zhou, J.; Feng, X.; Lu, G.; Tan, S.; Liu, F.; Sun, Y. Optimized Active Layer Morphology Toward Efficient and Polymer Batch Insensitive Organic Solar Cells. Nat. Commun. 2020, 11, 2855.
  •  
  • 15. Komilian, S.; Oklobia, O.; Sadat-Shafai, T. Controlling Intercalations of PBDTTT-EFT Side Chain to Initiate Suitable Network for Charge Extraction in PBDTTT-EFT:PC71BM Blended Bulk Heterojunction Solar Cell. Sol. Energy Mater. Sol. Cells 2018, 175, 35-40.
  •  
  • 16. Krishnan Jagadamma, L.; Sajjad, M. T.; Savikhin, V.; Toney, M. F.; Samuel, I. D. W. Correlating Photovoltaic Properties of a PTB7-Th:PC71BM Blend to Photophysics and Microstructure as a Function of Thermal Annealing. J. Mater. Chem. A 2017, 5, 14646-14657.
  •  
  • 17. Cheng, P.; Yan, C.; Wu, Y.; Dai, S.; Ma, W.; Zhan, X. Efficient and Stable Organic Solar Cells via a Sequential Process. J. Mater. Chem. C 2016, 4, 8086-8093.
  •  
  • 18. Mishra, A.; Bhuyan, N. N.; Xu, H.; Sharma, G. D. Advances in Layer-by-layer Processing for Efficient and Reliable Organic Solar Cells. Mater. Adv. 2023, 4, 6031-6063.
  •  
  • 19. Lin, Z.; Du, F.; Wang, H.; Cao, J.; Tang, W. An Unfused-ring Acceptor Enabling ~12% Efficiency for Layer-by-layer Organic Solar Cells. J. Mater. Chem. C 2022, 10, 10511-10518.
  •  
  • 20. Lee, T. H.; Park, S. Y.; Du, X.; Park, S.; Zhang, K.; Li, N.; Cho, S.; Brabec, C. J.; Kim, J. Y. Effects on Photovoltaic Characteristics by Organic Bilayer- and Bulk-Heterojunctions: Energy Losses, Carrier Recombination and Generation ACS Appl. Mater. Interfaces 2020, 12, 55945-55953.
  •  
  • 21. Gayathri, R. D.; Gokulnath, T.; Park, H.-Y.; Kim, J.; Kim, H.; Kim, J.; Kim, B.; Lee, Y.; Yoon, J.; Jin, S.-H. Impact of Aryl End Group Engineering of Donor Polymers on the Morphology and Efficiency of Halogen-Free Solvent-Processed Nonfullerene Organic Solar Cells. ACS Appl. Mater. Interfaces 2022, 14, 10616-10626.
  •  
  • 22. Zhu, L.; Zhang, M.; Zhou, G.; Hao, T.; Xu, J.; Wang, J.; Qiu, C.; Prine, N.; Ali, J.; Feng, W.; Gu, X.; Ma, Z.; Tang, Z.; Zhu, H.; Ying, L.; Zhang, Y.; Liu, F. Efficient Organic Solar Cell with 16.88% Efficiency Enabled by Refined Acceptor Crystallization and Morphology with Improved Charge Transfer and Transport Properties. Adv. Energy Mater. 2020, 10, 1904234.
  •  
  • 23. Vandewal, K.; Widmer, J.; Heumueller, T.; Brabec, C. J.; McGehee, M. D.; Leo, K.; Riede, M.; Salleo, A. Increased Open-Circuit Voltage of Organic Solar Cells by Reduced Donor-Acceptor Interface Area. Adv. Mater. 2014, 26, 3839-3843.
  •  
  • 24. Xu, W.; Zhu, X.; Ma, X.; Zhou, H.; Li, X.; Jeong, S. Y.; Woo, H. Y.; Zhou, Z.; Sun, Q.; Zhang, F. Achieving 15.81% and 15.29% Efficiency of All-polymer Solar Cells Based on Layer-by-layer and Bulk Heterojunction Structures. J. Mater. Chem. A 2022, 10, 13492-13499.
  •  
  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2024 Impact Factor : 0.6
  • Indexed in SCIE

This Article

  • 2025; 49(4): 417-424

    Published online Jul 25, 2025

  • 10.7317/pk.2025.49.4.417
  • Received on Nov 1, 2024
  • Revised on Jan 20, 2025
  • Accepted on Mar 9, 2025

Correspondence to

  • Tack Ho Lee

  • Graduate Department of Chemical Materials, Institute for Plastic Information and Energy Materials, Sustainable Utilization of Photovoltaic Energy Research Center, Pusan National University, Busan 46241, Korea

  • E-mail: tackho@pusan.ac.kr