Core/shell PbSe/PbS QDs TiO2 heterojunction solar cell

Lioz Etgar; Diana Yanover; Richard Karel Čapek; Roman Vaxenburg; Zhaosheng Xue; Bin Liu; Mohammad Khaja Nazeeruddin; Efrat Lifshitz; Michael Grätzel

doi:10.1002/adfm.201202322

Core/shell PbSe/PbS QDs TiO₂ heterojunction solar cell

Lioz Etgar^*, Diana Yanover, Richard Karel Čapek, Roman Vaxenburg, Zhaosheng Xue, Bin Liu, Mohammad Khaja Nazeeruddin, Efrat Lifshitz, Michael Grätzel

^*Corresponding author for this work

Institute of Chemistry

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

101 Scopus citations

Abstract

Quasi type-II PbSe/PbS quantum dots (QDs) are employed in a solid state high efficiency QD/TiO₂ heterojunction solar cell. The QDs are deposited using layer-by-layer deposition on a half-micrometer-thick anatase TiO₂ nanosheet film with (001) exposed facets. Theoretical calculations show that the carriers in PbSe/PbS quasi type-II QDs are delocalized over the entire core/shell structure, which results in better QD film conductivity compared to PbSe QDs. Moreover, PbS shell permits better stability and facile electron injection from the QDs to the TiO₂ nanosheets. To complete the electrical circuit of the solar cell, a Au film is evaporated as a back contact on top of the QDs. This PbSe/PbS QD/TiO₂ heterojunction solar cell produces a light to electric power conversion efficiency (η) of 4% with short circuit photocurrent (J_sc) of 17.3 mA/cm². This report demonstrates highly efficient core/shell near infrared QDs in a QD/TiO₂ heterojunction solar cell.

Original language	English
Pages (from-to)	2736-2741
Number of pages	6
Journal	Advanced Functional Materials
Volume	23
Issue number	21
DOIs	https://doi.org/10.1002/adfm.201202322
State	Published - 6 Jun 2013

Keywords

PbSe/PbS
core shell
heterojunction solar cell
stability
wave function

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

Access to Document

10.1002/adfm.201202322

Cite this

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title = "Core/shell PbSe/PbS QDs TiO2 heterojunction solar cell",

abstract = "Quasi type-II PbSe/PbS quantum dots (QDs) are employed in a solid state high efficiency QD/TiO2 heterojunction solar cell. The QDs are deposited using layer-by-layer deposition on a half-micrometer-thick anatase TiO2 nanosheet film with (001) exposed facets. Theoretical calculations show that the carriers in PbSe/PbS quasi type-II QDs are delocalized over the entire core/shell structure, which results in better QD film conductivity compared to PbSe QDs. Moreover, PbS shell permits better stability and facile electron injection from the QDs to the TiO2 nanosheets. To complete the electrical circuit of the solar cell, a Au film is evaporated as a back contact on top of the QDs. This PbSe/PbS QD/TiO2 heterojunction solar cell produces a light to electric power conversion efficiency (η) of 4% with short circuit photocurrent (Jsc) of 17.3 mA/cm2. This report demonstrates highly efficient core/shell near infrared QDs in a QD/TiO2 heterojunction solar cell.",

keywords = "PbSe/PbS, core shell, heterojunction solar cell, stability, wave function",

author = "Lioz Etgar and Diana Yanover and {\v C}apek, {Richard Karel} and Roman Vaxenburg and Zhaosheng Xue and Bin Liu and Nazeeruddin, {Mohammad Khaja} and Efrat Lifshitz and Michael Gr{\"a}tzel",

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AU - Etgar, Lioz

AU - Yanover, Diana

AU - Čapek, Richard Karel

AU - Vaxenburg, Roman

AU - Xue, Zhaosheng

AU - Liu, Bin

AU - Nazeeruddin, Mohammad Khaja

AU - Lifshitz, Efrat

AU - Grätzel, Michael

PY - 2013/6/6

Y1 - 2013/6/6

N2 - Quasi type-II PbSe/PbS quantum dots (QDs) are employed in a solid state high efficiency QD/TiO2 heterojunction solar cell. The QDs are deposited using layer-by-layer deposition on a half-micrometer-thick anatase TiO2 nanosheet film with (001) exposed facets. Theoretical calculations show that the carriers in PbSe/PbS quasi type-II QDs are delocalized over the entire core/shell structure, which results in better QD film conductivity compared to PbSe QDs. Moreover, PbS shell permits better stability and facile electron injection from the QDs to the TiO2 nanosheets. To complete the electrical circuit of the solar cell, a Au film is evaporated as a back contact on top of the QDs. This PbSe/PbS QD/TiO2 heterojunction solar cell produces a light to electric power conversion efficiency (η) of 4% with short circuit photocurrent (Jsc) of 17.3 mA/cm2. This report demonstrates highly efficient core/shell near infrared QDs in a QD/TiO2 heterojunction solar cell.

AB - Quasi type-II PbSe/PbS quantum dots (QDs) are employed in a solid state high efficiency QD/TiO2 heterojunction solar cell. The QDs are deposited using layer-by-layer deposition on a half-micrometer-thick anatase TiO2 nanosheet film with (001) exposed facets. Theoretical calculations show that the carriers in PbSe/PbS quasi type-II QDs are delocalized over the entire core/shell structure, which results in better QD film conductivity compared to PbSe QDs. Moreover, PbS shell permits better stability and facile electron injection from the QDs to the TiO2 nanosheets. To complete the electrical circuit of the solar cell, a Au film is evaporated as a back contact on top of the QDs. This PbSe/PbS QD/TiO2 heterojunction solar cell produces a light to electric power conversion efficiency (η) of 4% with short circuit photocurrent (Jsc) of 17.3 mA/cm2. This report demonstrates highly efficient core/shell near infrared QDs in a QD/TiO2 heterojunction solar cell.

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