Colloidal Quantum Dot Photovoltaics Using Ultrathin, 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 I. Nugraha; Emre Yarali; F. Pelayo Garclá De Arquer; Edward H. Sargent; Thomas D. Anthopoulos; Aram Amassian

doi:10.1021/acsaem.0c00831

Colloidal Quantum Dot Photovoltaics Using Ultrathin, 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 I. Nugraha, Emre Yarali, F. Pelayo Garclá De Arquer, Edward H. Sargent, Thomas D. Anthopoulos, Aram Amassian

^*Corresponding author for this work

Chemistry

Research output: Contribution to journal › Article › peer-review

8 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 language	English (US)
Pages (from-to)	5135-5141
Number of pages	7
Journal	ACS Applied Energy Materials
Volume	3
Issue number	6
DOIs	https://doi.org/10.1021/acsaem.0c00831
State	Published - Jun 22 2020

Keywords

colloidal quantum dots
electron-transporting layer
indium oxide
solar cells
stability
zinc oxide

ASJC Scopus subject areas

Chemical Engineering (miscellaneous)
Energy Engineering and Power Technology
Electrochemistry
Materials Chemistry
Electrical and Electronic Engineering

Access to Document

10.1021/acsaem.0c00831

Cite this

Kirmani, A. R., Eisner, F., Mansour, A. E., Firdaus, Y., Chaturvedi, N., Seitkhan, A., Nugraha, M. I., Yarali, E., Garclá De Arquer, F. P., Sargent, E. H., Anthopoulos, T. D., & Amassian, A. (2020). Colloidal Quantum Dot Photovoltaics Using Ultrathin, Solution-Processed Bilayer In₂O₃/ZnO Electron Transport Layers with Improved Stability. ACS Applied Energy Materials, 3(6), 5135-5141. https://doi.org/10.1021/acsaem.0c00831

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title = "Colloidal Quantum Dot Photovoltaics Using Ultrathin, Solution-Processed Bilayer In2O3/ZnO Electron Transport Layers with Improved Stability",

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.",

keywords = "colloidal quantum dots, electron-transporting layer, indium oxide, solar cells, stability, zinc oxide",

author = "Kirmani, {Ahmad R.} and Flurin Eisner and Mansour, {Ahmed E.} and Yuliar Firdaus and Neha Chaturvedi and Akmaral Seitkhan and Nugraha, {Mohamad I.} and Emre Yarali and {Garcl{\'a} De Arquer}, {F. Pelayo} and Sargent, {Edward H.} and Anthopoulos, {Thomas D.} and Aram Amassian",

note = "Funding Information: 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. Publisher Copyright: {\textcopyright} 2020 American Chemical Society.",

year = "2020",

month = jun,

day = "22",

doi = "10.1021/acsaem.0c00831",

language = "English (US)",

volume = "3",

pages = "5135--5141",

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Kirmani, AR, Eisner, F, Mansour, AE, Firdaus, Y, Chaturvedi, N, Seitkhan, A, Nugraha, MI, Yarali, E, Garclá De Arquer, FP, Sargent, EH, Anthopoulos, TD & Amassian, A 2020, 'Colloidal Quantum Dot Photovoltaics Using Ultrathin, Solution-Processed Bilayer In₂O₃/ZnO Electron Transport Layers with Improved Stability', ACS Applied Energy Materials, vol. 3, no. 6, pp. 5135-5141. https://doi.org/10.1021/acsaem.0c00831

TY - JOUR

T1 - Colloidal Quantum Dot Photovoltaics Using Ultrathin, 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 I.

AU - Yarali, Emre

AU - Garclá De Arquer, F. Pelayo

AU - Sargent, Edward H.

AU - Anthopoulos, Thomas D.

AU - Amassian, Aram

N1 - Funding Information: 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. Publisher Copyright: © 2020 American Chemical Society.

PY - 2020/6/22

Y1 - 2020/6/22

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.

KW - colloidal quantum dots

KW - electron-transporting layer

KW - indium oxide

KW - solar cells

KW - stability

KW - zinc oxide

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