Room-temperature fabrication of a delafossite CuCrO2 hole transport layer for perovskite solar cells
Abstract
Delafossite oxides are promising hole transport layer (HTL) candidates for perovskite solar cells, due to their wide band gap, favorable energy band alignment relative to the perovskite absorber and simplicity of processing. Here, we investigate the properties of CuCrO2 (CCO) delafossite films using an integration of experimental and computational techniques. Phase-pure CCO films are deposited at room temperature by spin-casting suspensions of hydrothermally-synthesized nanoparticles, for use in a glass/ITO/CCO/CH3NH3PbI3/C60/BCP/Ag device structure. Although density functional theory (DFT) calculations predict an elevated hole effective mass along certain crystallographic directions, the nearly isotropic shape and small size of the CCO nanoparticles preserves transport properties within the films by randomizing particle orientation, preventing these unfavorable directions from dominating the film conductivity. Experimental measurements confirm that the CCO films display appropriate optical and electrical properties for use as an HTL, in good agreement with the DFT calculations. Finally, solar cells made using these films exhibit stabilized power conversion efficiencies exceeding 14%, with only minor hysteresis in the current–voltage characteristics.
- Authors:
-
[1];
[4];
[3];
[2];
[1]
- Duke Univ., Durham, NC (United States)
- Univ. of Texas at Dallas, Richardson, TX (United States)
- Univ. of Toledo, OH (United States)
- Univ. of Texas at Dallas, Richardson, TX (United States); Univ. of Washington, Seattle, WA (United States)
- Publication Date:
- Research Org.:
- Duke Univ., Durham, NC (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- OSTI Identifier:
- 1593914
- Grant/Contract Number:
- EE0006712; AC02-05CH11231
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Materials Chemistry. A
- Additional Journal Information:
- Journal Volume: 6; Journal Issue: 2; Journal ID: ISSN 2050-7488
- Publisher:
- Royal Society of Chemistry
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 14 SOLAR ENERGY
Citation Formats
Dunlap-Shohl, Wiley A., Daunis, Trey B., Wang, Xiaoming, Wang, Jian, Zhang, Boya, Barrera, Diego, Yan, Yanfa, Hsu, Julia W. P., and Mitzi, David B. Room-temperature fabrication of a delafossite CuCrO2 hole transport layer for perovskite solar cells. United States: N. p., 2017.
Web. doi:10.1039/C7TA09494A.
Dunlap-Shohl, Wiley A., Daunis, Trey B., Wang, Xiaoming, Wang, Jian, Zhang, Boya, Barrera, Diego, Yan, Yanfa, Hsu, Julia W. P., & Mitzi, David B. Room-temperature fabrication of a delafossite CuCrO2 hole transport layer for perovskite solar cells. United States. https://doi.org/10.1039/C7TA09494A
Dunlap-Shohl, Wiley A., Daunis, Trey B., Wang, Xiaoming, Wang, Jian, Zhang, Boya, Barrera, Diego, Yan, Yanfa, Hsu, Julia W. P., and Mitzi, David B. Mon .
"Room-temperature fabrication of a delafossite CuCrO2 hole transport layer for perovskite solar cells". United States. https://doi.org/10.1039/C7TA09494A. https://www.osti.gov/servlets/purl/1593914.
@article{osti_1593914,
title = {Room-temperature fabrication of a delafossite CuCrO2 hole transport layer for perovskite solar cells},
author = {Dunlap-Shohl, Wiley A. and Daunis, Trey B. and Wang, Xiaoming and Wang, Jian and Zhang, Boya and Barrera, Diego and Yan, Yanfa and Hsu, Julia W. P. and Mitzi, David B.},
abstractNote = {Delafossite oxides are promising hole transport layer (HTL) candidates for perovskite solar cells, due to their wide band gap, favorable energy band alignment relative to the perovskite absorber and simplicity of processing. Here, we investigate the properties of CuCrO2 (CCO) delafossite films using an integration of experimental and computational techniques. Phase-pure CCO films are deposited at room temperature by spin-casting suspensions of hydrothermally-synthesized nanoparticles, for use in a glass/ITO/CCO/CH3NH3PbI3/C60/BCP/Ag device structure. Although density functional theory (DFT) calculations predict an elevated hole effective mass along certain crystallographic directions, the nearly isotropic shape and small size of the CCO nanoparticles preserves transport properties within the films by randomizing particle orientation, preventing these unfavorable directions from dominating the film conductivity. Experimental measurements confirm that the CCO films display appropriate optical and electrical properties for use as an HTL, in good agreement with the DFT calculations. Finally, solar cells made using these films exhibit stabilized power conversion efficiencies exceeding 14%, with only minor hysteresis in the current–voltage characteristics.},
doi = {10.1039/C7TA09494A},
journal = {Journal of Materials Chemistry. A},
number = 2,
volume = 6,
place = {United States},
year = {Mon Dec 04 00:00:00 EST 2017},
month = {Mon Dec 04 00:00:00 EST 2017}
}
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