Bimetallic PtSe nanoparticles incorporating with reduced graphene oxide as efficient and durable electrode materials for liquid-junction photovoltaic devices

• Published in: Materials today energy Vol. 16; p. 100384
• Main Author: Dao, Van-Duong
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01-06-2020
• Subjects: Counter electrode; Dye-sensitized solar cells; Hybrid materials; PtSe/graphene; Dye-sensitized solar cells; Hybrid materials; PtSe/graphene; Counter electrode
• ISSN: 2468-6069; 2468-6069
• DOI: 10.1016/j.mtener.2020.100384

In this work, we introduce the synthesis of PtSe alloys with the different stoichiometric ratio of Pt and Se in PtSe alloy on reduced graphene oxide (RGO). And, then the developed nanohybrid materials are employed for the first time as counter electrodes (CEs) for efficient third-generation solar cells. As a result, PtSe nanoalloys is located on the surface of RGO without any agglomerations. Furthermore, the developed materials also provide a porous three-dimensional network structure, suggesting rapid electron transfer paths. Therefore, the highest efficiency of 6.26% was obtained for a cell fabricated with Pt0·74Se0.26/RGO electrode that is due to the lowest charge-transfer resistance of 0.89 Ω and diffusion impedance of 0.88 Ω. The optimized efficiency is also higher than those of 4.98% and 4.34% for devices assembled with Pt/RGO and Se/RGO CEs, respectively. This work presents a general strategy for designing and fabricating porous PtSe alloy/RGO CEs for energy conversion devices.
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•Bimetallic PtSe nanoparticles/reduced graphene oxide (RGO) are prepared by dry plasma reduction.•The electrocatalytic activity as well as electric conductivity is significantly enhanced.•The highest efficiency is recorded from DSC employed Pt0·5Se0.5/RGO CE.•The strategy is for optimizing Pt utilization in PV-device using bimetallic nanoparticles.