TY - JOUR
T1 - Colloidal quantum dot photovoltaics using ultra-thin, solution-processed bilayer In2O3/ZnO electron transport layers with improved stability
AU - Kirmani, Ahmad R.
AU - Eisner, Flurin
AU - Mansour, Ahmed E
AU - Firdaus, Yuliar
AU - Chaturvedi, Neha
AU - Seitkhan, Akmaral
AU - Nugraha, Mohamad
AU - Yarali, Emre
AU - Garcia de Arquer, F. Pelayo
AU - Sargent, Edward H.
AU - Anthopoulos, Thomas D.
AU - Amassian, Aram
N1 - 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.
PY - 2020/5/28
Y1 - 2020/5/28
N2 - 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.
AB - 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.
UR - http://hdl.handle.net/10754/663242
UR - https://pubs.acs.org/doi/10.1021/acsaem.0c00831
U2 - 10.1021/acsaem.0c00831
DO - 10.1021/acsaem.0c00831
M3 - Article
SN - 2574-0962
JO - ACS Applied Energy Materials
JF - ACS Applied Energy Materials
ER -