Enhanced performance of inverted hybrid perovskite solar cells with interfacial passivation filler
- Authors
- Song, Q.; Yoon, J.; Liu, X.; Lee, E. -C
- Issue Date
- Jun-2023
- Publisher
- ELSEVIER
- Keywords
- Defect passivation; Small molecule; Interfacial filler; Photovoltaics
- Citation
- MATERIALS TODAY SUSTAINABILITY, v.22
- Journal Title
- MATERIALS TODAY SUSTAINABILITY
- Volume
- 22
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/87929
- DOI
- 10.1016/j.mtsust.2023.100381
- ISSN
- 2589-2347
- Abstract
- Defects at the interface between the perovskite and charge transport layers in perovskite solar cells serve as sites for non-radiative charge recombination as they are the main energy loss channels that reduce the open-circuit voltage. In this study, we used a small molecule, N-methyl-4-piperidone (NMPD), as an interfacial passivation filler between the perovskite and electron transport layers in inverted organic-inorganic hybrid CH3NH3PbI3 perovskite solar cells. The filler deactivates the charge traps at the interface, which are responsible for non-radiative charge recombination, and improves the electron extraction efficiency. Consequently, it enhanced the power conversion efficiency (PCE) from 16.3% to 20.1% by increasing both the open-circuit voltage and short-circuit current. Furthermore, after 800 h of aging without encapsulation at 35% humidity and 25 degrees C temperature, the device with NMPD filler retained 78.4% of the initial PCE. This indicates that the interfacial modification filler, with a single carbonyl group, can effectively improve the efficiency as well as the stability of perovskite devices.(c) 2023 Elsevier Ltd. All rights reserved.
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