Open AccessSmart photovoltaics based on dye-sensitized solar cells using photochromic spiropyran derivatives as photosensitizers
Author(s) -
Shengbo Ma,
Hungkit Ting,
Yingzhuang Ma,
Lingling Zheng,
Miwei Zhang,
Lixin Xiao,
Zhijian Chen
Publication year - 2015
Publication title -
aip advances
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.421
H-Index - 58
ISSN - 2158-3226
DOI - 10.1063/1.4921880
Subject(s) - photochromism , spiropyran , photochemistry , sunlight , optoelectronics , materials science , photovoltaics , absorption (acoustics) , photoisomerization , photovoltaic system , absorption spectroscopy , organic solar cell , optics , chemistry , isomerization , physics , organic chemistry , catalysis , ecology , polymer , composite material , biology
In this paper, smart photovoltaic (SPV) devices, integrating both functions of solar cells and smart windows, was fabricated based on dye-sensitized solar cells using photochromic spiropyran derivatives SIBT as photosensitizers. SPV devices have self-regulated power conversion efficiency (PCE) and light transmission responding to the incident spectra due to the photoisomerization of SIBT. SIBT isomerize from closed-ring form to open-ring form under UV illumination, accompanied with enhanced visible light absorption and electron delocalization. Therefore, increased PCE and absorption in SPV devices were observed under UV treatment and the devices can be restored gradually to the initial status when kept in dark. The SPV devices have self-regulation of PCE and sunlight transmission responding to the changing sun spectra in different times of a day, providing a proper energy usage and a better sun-shading
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