Abstract
Perovskite solar cells (PSCs) with no charge transport layers (CTLs) could be one of the major device architectures for the production of simple and low-cost devices. However, CTLs-free PSCs based on n-p homojunction have yet to show high power conversion efficiency (PCE), which is most likely due to inadequate light-and charge-management in the p-type perovskite. The device operation is examined using Solar Cell Capacitance Simulator (SCAPS)-software, and a novel n-p homojunction design is proposed to attempt efficient CTLs-free PSCs. Several aspects of p-type layer that can affect device performance, such as acceptor density, photon-harvesting capability, defects density, and resistances to the transport of charge-carriers are scrutinized and adjusted. Furthermore, the effects of different work-functions of metal electrodes are examined. A suitable acceptor concentration is required for oriented charge transport. It is determined that a p-type perovskite with a thickness of 0.3 μm is advantageous for high performance. A metal electrode with a high work-function is essential for efficient device. Consequently, a PCE of 15.60% is obtained with an optimal defect density of E15 cm−3, indicating that n-p homojunction-based CTLs-free PSCs are promising since they simplify the device design and fabrication process while retaining an acceptable PCE.
Original language | English |
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Pages (from-to) | 69-77 |
Number of pages | 9 |
Journal | Solar Energy |
Volume | 238 |
DOIs | |
State | Published - 15 May 2022 |
Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2022 International Solar Energy Society
Keywords
- Acceptor density
- CTLs-free PSC
- Defect density
- P-type absorber
- Thickness
- Work function
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- General Materials Science