Please use this identifier to cite or link to this item: http://localhost:8080/xmlui/handle/123456789/4141
Title: Indoor Light-harvesting Dye-sensitized Solar Cells Surpassing 30% Efficiency Without Co-sensitizers
Authors: Haridas, R
Velore, J
Pradhan, S C
Vindhyasarumi, A
Yoosaf, K
Soman, S
Unni, K N N
Ajayaghosh, A
Keywords: solar cells
Issue Date: 2021
Publisher: Royal society of chemistry
Citation: Materials Advances;2(23):7773-7787
Abstract: Dye-sensitized solar cells (DSCs) have proven to be one of the best photovoltaic approaches for harnessing indoor/artificial light. Herein, we report two new molecularly engineered, cost-effective, metal-free, carbazole-based D–π–A sensitizers (YK 8 and YK 9) by judiciously varying their π-spacers, which are suitable for indoor photovoltaic applications. Using YK 8, we achieved an efficiency of 28.7% under standard 1000 lux Osram 14 W T2 cool day light fluorescent tube illumination with a power output of 68.88 μW cm−2 and 30.24% with a power output of 108.85 μW cm−2 under a higher illumination intensity of 1500 lux without co-sensitizers using iodide/triiodide electrolyte. With a small footprint/active area of 1.24 cm2, we could power a temperature sensor completely autonomously at a low light intensity of 500 lux, displaying the potential of these indoor photovoltaic devices to serve as energy sources for low-power sensors and actuators on the Internet of Things (IoT) network, reducing the dependence on batteries and leading to a smaller carbon footprint. The role of the π-spacer and its influence on recombination and device performance were explored via extensive interfacial studies.
Appears in Collections:2021

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