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HL: Fachverband Halbleiterphysik

HL 7: Poster I

HL 7.11: Poster

Montag, 27. März 2023, 13:00–15:00, P2/EG

GaAs/PEDOT:PSS Hybrid Solar Cell Improvement by the Incorporation of Ternary Quantum Dots — •Alexander Ehm¹, Oleksandr Selyshchev¹, Serhiy Kondratenko², and Dietrich R. T. Zahn¹ — ¹Semiconductor Physics, TU Chemnitz, Chemnitz D-09107, Germany — ²Taras Shevchenko National University of Kyiv, 01601 Kyiv, Ukraine

Colloidal quantum dots (QD) have gained much interest over recent years due to their absorption and photoluminescence properties, which can be tuned by varying the particle size. Among these, ternary In-based chalcogenide QDs possess the advantage of low toxicity, making them more environmentally friendly candidates for the application in solar harvesting devices for green energy production.

As a prove of concept, colloidal AgInS and CuInS QDs [1] are deposited on n-GaAs(100) substrates in order to incorporate them in hybrid GaAs/PEDOT:PSS solar cells. The deposition is verified and analysed by X-ray photoemission and optical spectroscopy methods as well as atomic force microscopy. A significantly enhanced power conversion efficiency of such solar cells modified by colloidal QDs compared to the devices without QDs is shown by current density-voltage measurements under AM1.5 equivalent illumination.

[1] A. Raevskaya et al., J. Phys. Chem. C 2017, 121, 9032