Quantum Dot-Induced Phase Stabilization of ..alpha..-CsPbI3 Perovskite for High-Efficiency Photovoltaics

Joseph Luther; Jeffrey Christians; Erin Sanehira; David Moore; Abhishek Swarnkar; Tamoghna Chakrabarti; Ashley Marshall; Boris Chernomordik

doi:10.1126/science.aag2700

Quantum Dot-Induced Phase Stabilization of ..alpha..-CsPbI3 Perovskite for High-Efficiency Photovoltaics

Joseph Luther, Jeffrey Christians, Erin Sanehira, David Moore, Abhishek Swarnkar, Tamoghna Chakrabarti, Ashley Marshall, Boris Chernomordik

Chemistry and Nanoscience

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

2332 Scopus Citations

Abstract

We show nanoscale phase stabilization of CsPbI₃ quantum dots (QDs) to low temperatures that can be used as the active component of efficient optoelectronic devices. CsPbI₃ is an all-inorganic analog to the hybrid organic cation halide perovskites, but the cubic phase of bulk CsPbI₃ (α-CsPbI₃) - the variant with desirable band gap - is only stable at high temperatures. We describe the formation of α-CsPbI₃ QD films that are phase-stable for months in ambient air. The films exhibit long-range electronic transport and were used to fabricate colloidal perovskite QD photovoltaic cells with an open-circuit voltage of 1.23 volts and efficiency of 10.77%. These devices also function as light-emitting diodes with low turn-on voltage and tunable emission.

Original language	American English
Pages (from-to)	92-95
Number of pages	4
Journal	Science
Volume	354
Issue number	6308
DOIs	https://doi.org/10.1126/science.aag2700 https://doi.org/10.1126/science.aag2700
State	Published - 7 Oct 2016

Bibliographical note

Publisher Copyright:
© 2016, American Association for the Advancement of Science. All rights reserved.

NREL Publication Number

NREL/JA-5900-66542

Keywords

nanocrystal solar cells
perovskite solar cells
quantum dot solar cells

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title = "Quantum Dot-Induced Phase Stabilization of ..alpha..-CsPbI3 Perovskite for High-Efficiency Photovoltaics",

abstract = "We show nanoscale phase stabilization of CsPbI3 quantum dots (QDs) to low temperatures that can be used as the active component of efficient optoelectronic devices. CsPbI3 is an all-inorganic analog to the hybrid organic cation halide perovskites, but the cubic phase of bulk CsPbI3 (α-CsPbI3) - the variant with desirable band gap - is only stable at high temperatures. We describe the formation of α-CsPbI3 QD films that are phase-stable for months in ambient air. The films exhibit long-range electronic transport and were used to fabricate colloidal perovskite QD photovoltaic cells with an open-circuit voltage of 1.23 volts and efficiency of 10.77%. These devices also function as light-emitting diodes with low turn-on voltage and tunable emission.",

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AU - Luther, Joseph

AU - Christians, Jeffrey

AU - Sanehira, Erin

AU - Moore, David

AU - Swarnkar, Abhishek

AU - Chakrabarti, Tamoghna

AU - Marshall, Ashley

AU - Chernomordik, Boris

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N2 - We show nanoscale phase stabilization of CsPbI3 quantum dots (QDs) to low temperatures that can be used as the active component of efficient optoelectronic devices. CsPbI3 is an all-inorganic analog to the hybrid organic cation halide perovskites, but the cubic phase of bulk CsPbI3 (α-CsPbI3) - the variant with desirable band gap - is only stable at high temperatures. We describe the formation of α-CsPbI3 QD films that are phase-stable for months in ambient air. The films exhibit long-range electronic transport and were used to fabricate colloidal perovskite QD photovoltaic cells with an open-circuit voltage of 1.23 volts and efficiency of 10.77%. These devices also function as light-emitting diodes with low turn-on voltage and tunable emission.

AB - We show nanoscale phase stabilization of CsPbI3 quantum dots (QDs) to low temperatures that can be used as the active component of efficient optoelectronic devices. CsPbI3 is an all-inorganic analog to the hybrid organic cation halide perovskites, but the cubic phase of bulk CsPbI3 (α-CsPbI3) - the variant with desirable band gap - is only stable at high temperatures. We describe the formation of α-CsPbI3 QD films that are phase-stable for months in ambient air. The films exhibit long-range electronic transport and were used to fabricate colloidal perovskite QD photovoltaic cells with an open-circuit voltage of 1.23 volts and efficiency of 10.77%. These devices also function as light-emitting diodes with low turn-on voltage and tunable emission.

KW - nanocrystal solar cells

KW - perovskite solar cells

KW - quantum dot solar cells

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Quantum Dot-Induced Phase Stabilization of ..alpha..-CsPbI3 Perovskite for High-Efficiency Photovoltaics

Abstract

Bibliographical note

NREL Publication Number

Keywords

UN SDGs

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