Please use this identifier to cite or link to this item:
Title: Realizing reduced imperfections via quantum dots interdiffusion in high efficiency perovskite solar cells
Authors: Xie, Lin
Vashishtha, Parth
Koh, Teck Ming
Harikesh, Padinhare Cholakkal
Jamaludin, Nur Fadilah
Bruno, Annalisa
Hooper, Thomas J. N.
Li, Jia
Ng, Yan Fong
Mhaisalkar, Subodh Gautam
Mathews, Nripan
Keywords: Engineering::Materials
Issue Date: 2020
Source: Xie, L., Vashishtha, P., Koh, T. M., Harikesh, P. C., Jamaludin, N. F., Bruno, A., Hooper, T. J. N., Li, J., Ng, Y. F., Mhaisalkar, S. G. & Mathews, N. (2020). Realizing reduced imperfections via quantum dots interdiffusion in high efficiency perovskite solar cells. Advanced Materials, 32(40), 2003296-.
Project: NRF2018-ITC001-001
Journal: Advanced Materials
Abstract: Realization of reduced ionic (cationic and anionic) defects at the surface and grain boundaries (GBs) of perovskite films is vital to boost the power conversion efficiency of organic-inorganic halide perovskite (OIHP) solar cells. Although numerous strategies have been developed, effective passivation still remains a great challenge due to the complexity and diversity of these defects. Herein, a solid-state interdiffusion process using multi-cation hybrid halide perovskite quantum dots (QDs) is introduced as a strategy to heal the ionic defects at the surface and GBs. It is found that the solid-state interdiffusion process leads to a reduction in OIHP shallow defects. In addition, Cs+ distribution in QDs greatly influences the effectiveness of ionic defect passivation with significant enhancement to all photovoltaic performance characteristics observed on treating the solar cells with Cs0.05 (MA0.17 FA0.83 )0.95 PbBr3 (abbreviated as QDs-Cs5). This enables power conversion efficiency (PCE) exceeding 21% to be achieved with more than 90% of its initial PCE retained on exposure to continuous illumination of more than 550 h.
ISSN: 0935-9648
DOI: 10.1002/adma.202003296
Schools: School of Materials Science and Engineering 
Research Centres: Energy Research Institute @ NTU (ERI@N) 
NTU Center of High Field NMR Spectroscopy and Imaging
Rights: © 2020 Wiley-VCH GmbH. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:ERI@N Journal Articles
MSE Journal Articles

Citations 10

Updated on Dec 11, 2023

Web of ScienceTM
Citations 10

Updated on Oct 30, 2023

Page view(s)

Updated on Dec 11, 2023

Google ScholarTM




Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.