Tailoring the Grain Boundaries of Wide‐Bandgap Perovskite Solar Cells by Molecular Engineering
| Autor: | Buddhi Sagar Lamsal, Ashiqur Rahman Laskar, Wenqin Luo, Raja Sekhar Bobba, Ashraful Haider Chowdhury, Hytham Elbohy, Sheikh Ifatur Rahman, Khalid Emshadi, Rajesh Pathak, Ke Chen, Behzad Bahrami, Quinn Qiao, Nabin Ghimire, Ashim Gurung |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
business.industry Band gap Energy conversion efficiency Energy Engineering and Power Technology Solar energy Atomic and Molecular Physics and Optics Grain size Electronic Optical and Magnetic Materials Photovoltaics Optoelectronics Grain boundary Crystallite Electrical and Electronic Engineering business Perovskite (structure) |
| Zdroj: | Solar RRL. 4:2000384 |
| ISSN: | 2367-198X |
| Popis: | Due to the attraction of fabricating highly efficient tandem solar cells, wide‐bandgap perovskite solar cells have attracted substantial interest in recent years. However, polycrystalline perovskite thin‐films show the existence of trap states at grain boundaries which diminish the optoelectronic properties of the perovskite and thus remains a challenge. Here, we demonstrate a one‐step solution‐processing of the [MA0.9Cs0.1Pb(I0.6Br0.4)3] wide‐bandgap perovskite using Phenylhydrazine Iodide with amino groups to successfully passivate the trap density within grain boundaries and increase the perovskite grain size. The reinforced morphology and grain boundaries treatment considerably enhanced the power conversion efficiency from 12.16% for pristine to 14.63% for the treated devices. This strategy can be easily adopted to other perovskites and help realize highly efficient perovskite solar cells. This article is protected by copyright. All rights reserved. |
| Databáze: | OpenAIRE |
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