Colloidal Quantum Dot Photovoltaics Enhanced by Perovskite Shelling

Zhenyu Yang, Alyf Janmohamed, Xinzheng Lan, F. Pelayo Garcia de Arquer, Oleksandr Voznyy, Emre Yassitepe, Gi-Hwan Kim, Zhijun Ning, Xiwen Gong, Riccardo Comin, Edward H. Sargent

Research output: Contribution to journalArticlepeer-review

168 Scopus citations

Abstract

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%.
Original languageEnglish (US)
Pages (from-to)7539-7543
Number of pages5
JournalNano Letters
Volume15
Issue number11
DOIs
StatePublished - 2015
Externally publishedYes

Bibliographical note

KAUST Repository Item: Exported on 2021-11-04
Acknowledged KAUST grant number(s): KUS-11-009-21
Acknowledgements: This publication is based in part on supported by Award KUS-11-009-21, from King Abdullah University of Science and Technology (KAUST), by the Ontario Research Fund Research Excellence Program, by the Natural Sciences and Engineering Research Council (NSERC) of Canada, and by the International Cooperation of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government Ministry of Knowledge Economy (2012T100100740). A.J. thanks NSERC for Undergraduate Student Research Award Funding. E.Y. acknowledges support from FAPESP-BEPE fellowship (2014/18327-9). The authors thank E. Palmiano, L. Levina, R. Wolowiec, and D. Kopilovic for helpful discussions.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.

ASJC Scopus subject areas

  • Bioengineering
  • General Materials Science
  • General Chemistry
  • Mechanical Engineering
  • Condensed Matter Physics

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