Stepping toward Portable Optoelectronics with SnO2 Quantum Dot-Based Electron Transport Layers


Kiani M.S. Parkhomenko H.P. Mangrulkar M. Aigarayeva S. Akhanuly A. Shalenov E.O. Ng A. Jumabekov A.N.
13 June 2023American Chemical Society

ACS Omega
2023#8Issue 2321212 - 21222 pp.

With a power conversion efficiency (PCE) of more than 25%, perovskite solar cells (PSCs) have shown an immense potential application for solar energy conversion. Owing to lower manufacturing costs and facile processibility via printing techniques, PSCs can easily be scaled up to an industrial scale. The device performance of printed PSCs has been improving steadily with the development and optimization of the printing process for the device functional layers. Various kinds of SnO2 nanoparticle (NP) dispersion solutions including commercial ones are used to print the electron transport layer (ETL) of printed PSCs, and high processing temperatures are often required to obtain ETLs with optimum quality. This, however, limits the application of SnO2 ETLs in printed and flexible PSCs. In this work, the use of an alternative SnO2 dispersion solution based on SnO2 quantum dots (QDs) to fabricate ETLs of printed PSCs on flexible substrates is reported. A comparative analysis of the performance and properties of the obtained devices with the devices fabricated employing ETLs made with a commercial SnO2 NP dispersion solution is carried out. The ETLs made with SnO2 QDs are shown to improve the performance of devices by ∼11% on average compared to the ETLs made with SnO2 NPs. It is found that employing SnO2 QDs can reduce trap states in the perovskite layer and improve charge extraction in devices.



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Department of Physics, School of Sciences and Humanities, Nazarbayev University, Astana, 010000, Kazakhstan
Department of General Physics, Satbayev University, Almaty, 050013, Kazakhstan
Department of Electrical and Computer Engineering, School of Engineering and Digital Sciences, Nazarbayev University, Astana, 010000, Kazakhstan

Department of Physics
Department of General Physics
Department of Electrical and Computer Engineering

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