n-Doping of photoactive layer in binary organic solar cells realizes over 18.3% efficiency
文献类型： 外文期刊
作者： Li, Danqin 1 ; Geng, Fushan 1 ; Hao, Tianyu 2 ; Chen, Zeng 3 ; Wu, Hongbo 4 ; Ma, Zaifei 4 ; Xue, Qifan 6 ; Lin, Lina 1 ; Huang, Rong 1 ; Leng, Shifeng 2 ; Hu, Bingwen 1 ; Liu, Xianjie 9 ; Wang, Jie 5 ; Zhu, Haiming 3 ; Lv, Menglan 7 ; Ding, Liming 8 ; Fahlman, Mats 9 ; Bao, Qinye 1 ; Li, Yongfang 10 ;
作者机构： 1.East China Normal Univ, Sch Phys & Elect Sci, Shanghai 200241, Peoples R China
2.Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, Shanghai 200241, Peoples R China
3.Zhejiang Univ, Dept Chem, Chem High Performance & Novel Mat, Hangzhou 310027, Zhejiang, Peoples R China
4.Donghua Univ, Ctr Adv Low Dimens Mat, Shanghai 201620, Peoples R China
5.Chinese Acad Fishery Sci, Fishery Machinery & Instrument Res Inst, Shanghai 200092, Peoples R China
6.South China Univ Technol, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Peoples R China
7.Guizhou Univ, Sch Chem & Chem Engn, Guiyang 550025, Peoples R China
8.Natl Ctr Nanosci & Technol, Ctr Excellence Nanosci, Key Lab Nanosyst & Hierarch Fabricat CAS, Beijing 100190, Peoples R China
9.Linkoping Univ, Lab Organ Elect, ITN, SE-60174 Norrkoping, Sweden
10.Chinese Acad Sci, Beijing Natl Lab Mol Sci, CAS Key Lab Organ Solids, Inst Chem, Beijing 100190, Peoples R China
11.Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan 030006, Peoples R China
关键词： n-doping; Organic solar cells; Charge transport; Morphology; Power conversion efficiency
期刊名称：NANO ENERGY （ 影响因子：19.069； 五年影响因子：18.984 ）
ISSN： 2211-2855
年卷期： 2022 年 96 卷
页码：
收录情况： SCI
摘要： Electronic doping of conjugated semiconductor plays a critical role in the fabrication of high efficiency organic optoelectronic devices. Here, we report an organic solar cell (OSC) by doping n-type DMBI-BDZC into one host binary bulk heterojunction (BHJ) photoactive layer comprised of a polymer donor PM6 and a nonfullerene acceptor Y6. The resulting champion device yields a significantly improved power conversion efficiency from 17.17% to 18.33% with an impressive fill factor of 80.20%. It is found that the electrically doped photoactive layer exhibits enhanced and balanced charge carrier mobilities, more effective exciton dissociation, longer carrier lifetime, and suppressed charge recombination with smaller energy loss. The dopant molecule DMBIBDZC also act as a surface morphology modifier of the photoactive layer with enhanced charge transport. This work demonstrates that manipulation of charge transport via adding a low concentration dopant into photoactive layer is a promising approach for further improvement of BHJ OSC performance.
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