Journal
NANO LETTERS
Volume 15, Issue 11, Pages 7539-7543Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.5b03271
Keywords
Colloidal quantum dots; solar cells; perovskites; ligand exchange; surface passivation
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Funding
- King Abdullah University of Science and Technology (KAUST) [KUS-11-009-21]
- Ontario Research Fund Research Excellence Program
- Natural Sciences and Engineering Research Council (NSERC) of Canada
- International Cooperation of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant - Korea government Ministry of Knowledge Economy [2012T100100740]
- NSERC
- FAPESP-BEPE fellowship [2014/18327-9]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20128520010010] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Solution-processed quantum dots are a promising material for large-scale, low-cost solar cell applications. New device architectures and improved passivation have been instrumental in increasing the performance of quantum dot photovoltaic devices. Here we report photovoltaic devices based on inks of quantum dot on which we grow thin perovskite shells in solid-state films. Passivation using the perovskite was achieved using a facile solution ligand exchange followed by postannealing. The resulting hybrid nanostructure created a more intrinsic CQD film, which, when incorporated into a photovoltaic device with graded bandstructure, achieved a record solar cell performance for single-step-deposited CQD films, exhibiting an AM1.5 solar power conversion efficiency of 8.95%.
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