Molecular Engineering of Low-Cost, Efficient and Stable Photosensitizers for Dye-Sensitized Solar Cells
Zhongjin Shen a
a School of Natural and Environmental Sciences, Newcastle University, United Kingdom NE1 7RU
Poster, Zhongjin Shen, 178
Publication date: 6th February 2024

The cost, stability and photovoltaic performance of photosensitizers play a key role for the commercialization of dye-sensitized solar cells (DSCs). Herein, three novel sensitizers termed ZS10, ZS11 and ZS12 are described based on the simple chemical structure of the high-voltage dye MS5, by replacing the benzoic acid (BA) anchoring group with a 2-cyanobenzoic acid (CBA), phenyl-cyanoacrylic acid (PCA) and ethynyl-phenyl-cyanoacrylic acid (EPCA) anchoring group, respectively. Through engineering of the dye structure, ZS12-based devices show the best power conversion efficiency (PCE) of up to 10.7% under standard air mass 1.5 global (AM1.5 G) condition, with an improved short-circuit current density (Jsc) of 12.26 mA cm-2 and an outstanding open-circuit voltage (Voc) of 1.18 V. Remarkably, ZS12 sensitized solar cells exhibit an excellent stability, maintaining 95% of its initial PCE under full sunlight for 800 hours. In addition, the projected low synthesis cost of dye ZS12 (less than 100 $ g-1) developed in this work is an attractive feature, facilitating the market development of DSCs based on highly efficient and stable sensitizers.

This research work was funded in part by Exeger AB, Sweden. J.G. acknowledges the financial support from Gebert Rüf Stiftung, Switzerland, under Microbials scheme “Solar-Bio Fuels” (GRS-080/19).

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