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A Capacitor‐type Faradaic Junction for Direct Solar Energy Conversion and Storage
Author(s) -
Wang Pin,
Chen Xiangtian,
Sun Gengzhi,
Wang Cheng,
Luo Jun,
Yang Liuqing,
Lv Jun,
Yao Yingfang,
Luo Wenjun,
Zou Zhigang
Publication year - 2021
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202011930
Subject(s) - optoelectronics , capacitor , electrode , materials science , energy storage , solar energy , voltage , dark current , energy conversion efficiency , power (physics) , electrical engineering , chemistry , physics , quantum mechanics , photodetector , engineering
Two‐electrode solar rechargeable devices trigger intense attention due to their potential applications in solar energy conversion and storage. However, interface energy barriers lead to severe loss of output voltage and negligible dark discharge current. Therefore, external biases are required for dark discharge in these devices, limiting their practical applications. Herein, we report a new two‐electrode device of Si/WO 3 /H 2 SO 4(aq) /C that can work without bias. The device has the highest dark output power among all of the two‐electrode solar rechargeable devices. The device based on a Si/WO 3 junction indicates photoinduced adjustable interface barrier height during charge transfer, which can overcome the energy barrier and realize dark discharge without bias. Owing to the interface characteristics, the Si/WO 3 is designated as a capacitor‐type Faradaic junction.