当前位置: X-MOL 学术Science › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Ion-modulated radical doping of spiro-OMeTAD for more efficient and stable perovskite solar cells
Science ( IF 56.9 ) Pub Date : 2022-07-28 , DOI: 10.1126/science.abo2757
Tiankai Zhang 1 , Feng Wang 1 , Hak-Beom Kim 2 , In-Woo Choi 2 , Chuanfei Wang 3 , Eunkyung Cho 4 , Rafal Konefal 5 , Yuttapoom Puttisong 1 , Kosuke Terado 6 , Libor Kobera 5 , Mengyun Chen 1 , Mei Yang 1 , Sai Bai 1 , Bowen Yang 7, 8 , Jiajia Suo 7, 8 , Shih-Chi Yang 9 , Xianjie Liu 3 , Fan Fu 9 , Hiroyuki Yoshida 6, 10 , Weimin M Chen 1 , Jiri Brus 5 , Veaceslav Coropceanu 4 , Anders Hagfeldt 7, 8 , Jean-Luc Brédas 4 , Mats Fahlman 3 , Dong Suk Kim 2 , Zhangjun Hu 1 , Feng Gao 1
Affiliation  

Record power conversion efficiencies (PCEs) of perovskite solar cells (PSCs) have been obtained with the organic hole transporter 2,2′,7,7′-tetrakis( N , N -di- p -methoxyphenyl-amine)9,9′-spirobifluorene (spiro-OMeTAD). Conventional doping of spiro-OMeTAD with hygroscopic lithium salts and volatile 4- tert -butylpyridine is a time-consuming process and also leads to poor device stability. We developed a new doping strategy for spiro-OMeTAD that avoids post-oxidation by using stable organic radicals as the dopant and ionic salts as the doping modulator (referred to as ion-modulated radical doping). We achieved PCEs of >25% and much-improved device stability under harsh conditions. The radicals provide hole polarons that instantly increase the conductivity and work function (WF), and ionic salts further modulate the WF by affecting the energetics of the hole polarons. This organic semiconductor doping strategy, which decouples conductivity and WF tunability, could inspire further optimization in other optoelectronic devices.

中文翻译:

spiro-OMeTAD 的离子调制自由基掺杂用于更高效和稳定的钙钛矿太阳能电池

使用有机空穴传输剂 2,2',7,7'-tetrakis(ñ,ñ-di-p-甲氧基苯基胺)9,9'-螺二芴(螺-OMeTAD)。spiro-OMeTAD 的常规掺杂与吸湿性锂盐和挥发性 4--丁基吡啶是一个耗时的过程,并且还导致器件稳定性差。我们开发了一种新的螺-OMeTAD 掺杂策略,通过使用稳定的有机自由基作为掺杂剂和离子盐作为掺杂调节剂(称为离子调节自由基掺杂)来避免后氧化。我们实现了 >25% 的 PCE,并在恶劣条件下大大提高了设备​​稳定性。自由基提供空穴极化子,可立即增加电导率和功函数 (WF),离子盐通过影响空穴极化子的能量进一步调节 WF。这种将导电性和WF可调性解耦的有机半导体掺杂策略可以激发其他光电器件的进一步优化。
更新日期:2022-07-28
down
wechat
bug