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Title: Enhanced mobility CsPbI 3 quantum dot arrays for record-efficiency, high-voltage photovoltaic cells

Here, we developed lead halide perovskite quantum dot (QD) films with tuned surface chemistry based on A-site cation halide salt (AX) treatments. QD perovskites offer colloidal synthesis and processing using industrially friendly solvents, which decouples grain growth from film deposition, and at present produce larger open-circuit voltages (V OC's) than thin-film perovskites. CsPbI 3 QDs, with a tunable bandgap between 1.75 and 2.13 eV, are an ideal top cell candidate for all-perovskite multijunction solar cells because of their demonstrated small V OC deficit. We show that charge carrier mobility within perovskite QD films is dictated by the chemical conditions at the QD-QD junctions. The AX treatments provide a method for tuning the coupling between perovskite QDs, which is exploited for improved charge transport for fabricating high-quality QD films and devices. The AX treatments presented here double the film mobility, enabling increased photocurrent, and lead to a record certified QD solar cell efficiency of 13.43%.
Authors:
 [1] ; ORCiD logo [2] ; ORCiD logo [3] ; ORCiD logo [3] ; ORCiD logo [3] ; ORCiD logo [3] ;  [3] ; ORCiD logo [4] ; ORCiD logo [3] ; ORCiD logo [3]
  1. National Renewable Energy Lab. (NREL), Golden, CO (United States); Univ. of Washington, Seattle, WA (United States)
  2. National Renewable Energy Lab. (NREL), Golden, CO (United States); Univ. of Colorado, Boulder, CO (United States)
  3. National Renewable Energy Lab. (NREL), Golden, CO (United States)
  4. Univ. of Washington, Seattle, WA (United States)
Publication Date:
Report Number(s):
NREL/JA-5K00-68723
Journal ID: ISSN 2375-2548
Grant/Contract Number:
AC36-08GO28308
Type:
Accepted Manuscript
Journal Name:
Science Advances
Additional Journal Information:
Journal Volume: 3; Journal Issue: 10; Journal ID: ISSN 2375-2548
Publisher:
AAAS
Research Org:
National Renewable Energy Lab. (NREL), Golden, CO (United States); Energy Frontier Research Centers (EFRC) (United States). Center for Advanced Solar Photophysics (CASP)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; 36 MATERIALS SCIENCE; quantum dots; perovskites; surface chemistry
OSTI Identifier:
1406985

Sanehira, Erin M., Marshall, Ashley R., Christians, Jeffrey A., Harvey, Steven P., Ciesielski, Peter N., Wheeler, Lance M., Schulz, Philip Adewole, Lin, Lih Y., Beard, Matthew C., and Luther, Joseph M.. Enhanced mobility CsPbI3 quantum dot arrays for record-efficiency, high-voltage photovoltaic cells. United States: N. p., Web. doi:10.1126/sciadv.aao4204.
Sanehira, Erin M., Marshall, Ashley R., Christians, Jeffrey A., Harvey, Steven P., Ciesielski, Peter N., Wheeler, Lance M., Schulz, Philip Adewole, Lin, Lih Y., Beard, Matthew C., & Luther, Joseph M.. Enhanced mobility CsPbI3 quantum dot arrays for record-efficiency, high-voltage photovoltaic cells. United States. doi:10.1126/sciadv.aao4204.
Sanehira, Erin M., Marshall, Ashley R., Christians, Jeffrey A., Harvey, Steven P., Ciesielski, Peter N., Wheeler, Lance M., Schulz, Philip Adewole, Lin, Lih Y., Beard, Matthew C., and Luther, Joseph M.. 2017. "Enhanced mobility CsPbI3 quantum dot arrays for record-efficiency, high-voltage photovoltaic cells". United States. doi:10.1126/sciadv.aao4204. https://www.osti.gov/servlets/purl/1406985.
@article{osti_1406985,
title = {Enhanced mobility CsPbI3 quantum dot arrays for record-efficiency, high-voltage photovoltaic cells},
author = {Sanehira, Erin M. and Marshall, Ashley R. and Christians, Jeffrey A. and Harvey, Steven P. and Ciesielski, Peter N. and Wheeler, Lance M. and Schulz, Philip Adewole and Lin, Lih Y. and Beard, Matthew C. and Luther, Joseph M.},
abstractNote = {Here, we developed lead halide perovskite quantum dot (QD) films with tuned surface chemistry based on A-site cation halide salt (AX) treatments. QD perovskites offer colloidal synthesis and processing using industrially friendly solvents, which decouples grain growth from film deposition, and at present produce larger open-circuit voltages (VOC's) than thin-film perovskites. CsPbI3 QDs, with a tunable bandgap between 1.75 and 2.13 eV, are an ideal top cell candidate for all-perovskite multijunction solar cells because of their demonstrated small VOC deficit. We show that charge carrier mobility within perovskite QD films is dictated by the chemical conditions at the QD-QD junctions. The AX treatments provide a method for tuning the coupling between perovskite QDs, which is exploited for improved charge transport for fabricating high-quality QD films and devices. The AX treatments presented here double the film mobility, enabling increased photocurrent, and lead to a record certified QD solar cell efficiency of 13.43%.},
doi = {10.1126/sciadv.aao4204},
journal = {Science Advances},
number = 10,
volume = 3,
place = {United States},
year = {2017},
month = {10}
}