Interface Engineering of Mesoscopic Perovskite Solar Cells by Atomic Layer Deposition of Ta2O5
Source abstract
Abstract
Surface passivation of perovskite solar cells (PSCs) has been considered as an effective way to improve the efficiency and stability of devices. Here, we study the influence of an ultrathin layer of tantalum pentoxide (Ta2O5) as a passivation layer in the mesoscopic heterojunction PSCs. This material was conformally coated on top of mesoporous TiO2 (mp-TiO2) with various thicknesses by the atomic layer deposition technique. We observe that Ta2O5 reduces the recombination at the perovskite/mp-TiO2 contact surface and improves the charge transport, as proved by photoluminescence spectroscopies. With an optimized thickness of Ta2O5 (∼1.9 nm), a high-power conversion efficiency of 21.25% was obtained for the Ta2O5-modified device, mostly because of the enhancement of the open-circuit voltage (Voc). In addition, our modified cell exhibits low hysteresis, improved shelf life, and thermal and UV light stabilities compared to the unmodified device. Our study demonstrates the importance of surface passivation in mesoscopic PSCs.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Perovskite Materials and Applications · Quantum Dots Synthesis And Properties · Chalcogenide Semiconductor Thin Films
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Polymer Energy Materials Laboratory, School of Applied Chemical Engineering, Chonnam National University, Gwangju 61186, South Korea
Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
Department of Chemical Engineering, National Institute of Technology, Rourkela 769008, India
Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, Warsaw 01-224, Poland
Department of Chemistry, Faculty of Science, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia
Department of Solar Energy, School of Technology, Pandit Deendayal Petroleum University, Gandhinagar, Gujarat 382 007, India
Department of Chemistry, Kisan Veer Mahavidyalaya, Wai, 412803 Maharashtra, India
Funding
National Research Foundation of Korea · King Khalid University
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