Green processing of carbon electrodes from renewable sources for silver-bismuth bromide perovskite solar cells

Teresa Gatti

doi:10.1117/12.2634267

3 October 2022 Green processing of carbon electrodes from renewable sources for silver-bismuth bromide perovskite solar cells

Teresa Gatti

Author Affiliations +

Proceedings Volume PC12209, Organic, Hybrid, and Perovskite Photovoltaics XXIII; PC122090E (2022) https://doi.org/10.1117/12.2634267
Event: SPIE Organic Photonics + Electronics, 2022, San Diego, California, United States

Abstract

Perovskite solar cells based on alternatives to lead halide perovskites still present practical drawbacks related to the poor environmental stability (the tin-based ones) and the low power conversion efficiencies that they provide (the bismuth-based ones). The silver-bismuth double perovskite (Ag-Bi DP) is an interesting platform onto which to develop novel concepts for photovoltaic devices since, although presenting very poor optoelectronic properties, it features an excellent stability and is based on relatively a-toxic elements.[1] Its absorption features are hypsochromically shifted in comparison to those of classical lead iodide perovskites and they are more suitable to absorb photons coming from LED lamps, therefore for indoor photovoltaics, which could be exploited to power the IoT, for example.[2] In this context particularly, devices delivering relatively low-power can still have an economical impact, particularly if their costs of production are kept low. Herein we report on the development of Ag-Bi DP solar cells where the classical HTM and top (gold) electrode have been replaced by a carbon-black electrode processed from pure isopropanol though high-throughput ultrasonic spray-coating.[3] The carbon material in the electrode is obtained from the recycling of tires waste through the application of a hydrothermal process, which opens up further relevant perspectives for circularity. Although PCEs in the fabricated devices remain below the 1% threshold, we obtain remarkably high open circuit voltages (up to 1.2 V) from these architectures. This approach may represent a valuable solution for the future large scale production of sustainable photovoltaic devices to power the IoT.

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Teresa Gatti "Green processing of carbon electrodes from renewable sources for silver-bismuth bromide perovskite solar cells", Proc. SPIE PC12209, Organic, Hybrid, and Perovskite Photovoltaics XXIII, PC122090E (3 October 2022); https://doi.org/10.1117/12.2634267

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KEYWORDS

Perovskite

Electrodes

Solar cells

Carbon

Photovoltaics

Lead

Optoelectronic devices

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