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An Effective Method for Recovering Nonradiative Recombination Loss in Scalable Organic Solar Cells
Author(s) -
Xing Zhi,
Meng Xiangchuan,
Sun Rui,
Hu Ting,
Huang Zengqi,
Min Jie,
Hu Xiaotian,
Chen Yiwang
Publication year - 2020
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.202000417
Subject(s) - materials science , coating , crystallization , optoelectronics , organic solar cell , photoactive layer , fullerene , energy conversion efficiency , nanotechnology , chemical engineering , polymer solar cell , composite material , polymer , organic chemistry , chemistry , engineering
Regarded as a critical step in commercial applications, scalable printing technology has become a research frontier in the field of organic solar cells. However, inevitable efficiency loss always occurs in the lab‐to‐manufacturing translation due to the different fabrication processes. In fact, the decline of photovoltaic performance is mainly related to voltage loss, which is mainly affected by the diversity of phase separation morphology and the chemical structures of photoactive materials. Fullerene derivative indene‐C 60 bisadduct (ICBA) is introduced into a PBDB‐T‐2F:IT‐4F system to control the active layer morphology during blade‐coating process. Accordingly, as a symmetrical fullerene derivative, ICBA can regulate the crystallization tendency and molecular packing orientation and suppress charge carrier recombination. This ternary strategy overcomes the morphology issues caused by weaker shear impulse in blade‐coating process. Benefiting from the reduced nonradiative recombination loss, 1.05 cm 2 devices are fabricated by blade coating with a power conversion efficiency of 13.70%. This approach provides an effective support for recovering the voltage loss during scalable printing approaches.