Enhanced Mobility CsPbI3 Quantum Dot Arrays for Record-Efficiency, High-Voltage Photovoltaic Cells

Erin M. Sanehira; Ashley R. Marshall; Jeffrey A. Christians; Steven P. Harvey; Peter N. Ciesielski; Lance M. Wheeler; Philip Schulz; Lih Y. Lin; Matthew C. Beard; Joseph M. Luther

doi:10.1126/sciadv.aao4204

Enhanced Mobility CsPbI3 Quantum Dot Arrays for Record-Efficiency, High-Voltage Photovoltaic Cells

Erin M. Sanehira, Ashley R. Marshall, Jeffrey A. Christians, Steven P. Harvey, Peter N. Ciesielski, Lance M. Wheeler, Philip Schulz, Lih Y. Lin, Matthew C. Beard, Joseph M. Luther

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

842 Scopus Citations

Abstract

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. 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 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%.

Original language	American English
Article number	eaao4204
Number of pages	8
Journal	Science Advances
Volume	3
Issue number	10
DOIs	https://doi.org/10.1126/sciadv.aao4204 https://doi.org/10.1126/sciadv.aao4204
State	Published - 2017

Bibliographical note

Publisher Copyright:
Copyright © 2017 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science.

NREL Publication Number

NREL/JA-5K00-68723

Keywords

perovskites
quantum dots
surface chemistry

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

https://www.nrel.gov/docs/fy18osti/68723.pdf

Cite this

Sanehira, E. M., Marshall, A. R., Christians, J. A., Harvey, S. P., Ciesielski, P. N., Wheeler, L. M., Schulz, P., Lin, L. Y., Beard, M. C., & Luther, J. M. (2017). Enhanced Mobility CsPbI3 Quantum Dot Arrays for Record-Efficiency, High-Voltage Photovoltaic Cells. Science Advances, 3(10), Article eaao4204. https://doi.org/10.1126/sciadv.aao4204, https://doi.org/10.1126/sciadv.aao4204

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abstract = "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{\textquoteright}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%.",

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note = "Publisher Copyright: Copyright {\textcopyright} 2017 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science.",

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AU - Harvey, Steven P.

AU - Ciesielski, Peter N.

AU - Wheeler, Lance M.

AU - Schulz, Philip

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AB - 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%.

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Enhanced Mobility CsPbI3 Quantum Dot Arrays for Record-Efficiency, High-Voltage Photovoltaic Cells

Abstract

Bibliographical note

NREL Publication Number

Keywords

UN SDGs

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