Colloidal quantum dot photovoltaics using ultra-thin, solution-processed bilayer In2O3/ZnO electron transport layers with improved stability

Ahmad R. Kirmani, Flurin Eisner, Ahmed E Mansour, Yuliar Firdaus, Neha Chaturvedi, Akmaral Seitkhan, Mohamad Nugraha, Emre Yarali, F. Pelayo Garcia de Arquer, Edward H. Sargent, Thomas D. Anthopoulos, Aram Amassian

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Solution-processed colloidal quantum dot (CQD) photovoltaics (PVs) continue to mature with improvements in device architectures and ligand exchange strategies. Carrier selective contacts extract photogenerated charge carriers from the CQD absorber; however, the role of the electron-transporting layer (ETL) in stability remains unclear. Herein, we find that the typically used >100 nm thick ZnO ETL suffers from parasitic absorption and carrier recombination resulting in unstable n–i–p solar cells with faster UV-degradation. We address this by developing an ultrathin (ca. 20 nm), quantum-confined, solution-processed In2O3/ZnO ETL. This bilayer ETL results in solar cells with significantly improved overall stability without compromising performance, with an 11.1% power conversion efficiency hero device.
Original languageEnglish (US)
JournalACS Applied Energy Materials
DOIs
StatePublished - May 28 2020

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: This work was funded by the King Abdullah University of Science and Technology (KAUST). A.R.K. acknowledges helpful discussions with Joseph M. Luther and Giles E. Eperon.

Fingerprint

Dive into the research topics of 'Colloidal quantum dot photovoltaics using ultra-thin, solution-processed bilayer In2O3/ZnO electron transport layers with improved stability'. Together they form a unique fingerprint.

Cite this