Probing molecular orientation at bulk heterojunctions by polarization-selective transient absorption spectroscopy
Probing molecular orientation at bulk heterojunctions by polarization-selective transient absorption spectroscopy
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通过偏振选择性瞬态吸收光谱探测本体异质结的分子取向
DOI:
10.1007/s11426-021-1046-6
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发表时间:
2021-06
期刊:
影响因子:
--
通讯作者:
Wang Cheng
中科院分区:
文献类型:
--
作者:
Zhang Cankun;Zhang Yuzhe;Wang Zhiye;Su Yuming;Wei Zhixiang;Hou Jianhui;He Shan;Wu Kaifeng;He Chang;Zhang Jianqi;Wang Cheng
A bulk heterojunction in organic solar cells is where charge separation and recombination occur. Molecular orientation at the interface is one of the key factors that dictate solar cell efficiency. Although X–ray scattering-based methods can determine donor/acceptor domain orientations between an anisotropic phase and an isotropic fullerene-based phase, the rise of nonfullerene solar cells presents a new challenge in delineating local molecular directions at the interface between two anisotropic donor/acceptor domains. Here, we determine interfacial molecular orientations of three high-efficiency small molecule solar cells (ZR1:Y6, B1:BO–4Cl, and BTR:BO–4Cl) using polarization-selective transient absorption spectroscopy. The polarization anisotropy of charge separation dynamics indicates an angle of ~90° between ZR1 and Y6 molecules at the interface, an angle close to 0° between B1 and BO–4Cl, and random orientations between BTR and BO–4Cl. These observations provide complementary information to X–ray scattering measurements and highlight polarization-selective transient absorption spectroscopy as a tool to probe interfacial structure and dynamics of key photophysical steps in energy conversion.
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影响因子:
16.6
作者:
Zhou Ruimin;Jiang Zhaoyan;Yang Chen;Yu Jianwei;Feng Jirui;Adil Muhammad Abdullah;Deng Dan;Zou Wenjun;Zhang Jianqi;Lu Kun;Ma Wei;Gao Feng;Wei Zhixiang
通讯作者:
Wei Zhixiang
影响因子:
8.6
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Hou Jianhui
影响因子:
29.4
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Wang Jianqiu;Zheng Zhong;Zhang Dongyang;Zhang Jianqi;Zhou Jiyu;Liu Jingchong;Xie Shenkun;Zhao Yong;Zhang Yuan;Wei Zhixiang;Hou Jianhui;Tang Zhiyong;Zhou Huiqiong
通讯作者:
Zhou Huiqiong
影响因子:
9.5
作者:
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通讯作者:
M. Saito;T. Koganezawa;I. Osaka
影响因子:
19
作者:
Carpenter, Joshua H.;Ghasemi, Masoud;Ade, Harald
通讯作者:
Ade, Harald