Anggia Ismi Simpang, Alvien Ghifari, Soo-Young Han, Dini Hayati, Dang Xuan Long, Yoon Hee Jang, Jongin Hong
We report the facile synthesis of photochromic donor-π-acceptor (D-π-A) dyes featuring an azobenzene spacer with diphenylamine and dimethylamine as donor residues (DPAC and DMAC). We also investigate the spectroscopic and electrochemical properties of these dyes and their application to dye-sensitized solar cells (DSSCs). The trans-cis isomerization of the azobenzene bridge permits regulation of the photovoltaic behaviour in the DSSCs containing iodine- and cobalt-based redox electrolytes. The iodidie/triiodidie redox shuttle is suitable for DMAC-DSSCs, whereas the cobalt redox mediator is optimal for DPAC-DSSCs. DMAC- and DPAC-DSSCs yield power conversion efficiencies (PCEs) up to 1.99 % and 1.08 % under one sun illumination, when the solar cells are at the photostationary (PS) state. © 2023 Wiley-VCH GmbH.
Department of Chemistry, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul, 06974, South Korea; Department of Science, Institut Teknologi Sumatera, Jalan Terusan Ryacudu, Lampung Selatan, Lampung, 35365, Indonesia; Department of Smart Cities, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul, 06974, South Korea; Advanced Photovoltaics Research Center, Korea Institute of Science and Technology, 5 Hawarang-ro 14-gil, Seongbuk-gu, Seoul, 02792, South Korea
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