Balancing Charge Carrier Transport in a Quantum Dot P-N Junction toward Hysteresis-Free High-Performance Solar Cells

Yuljae Cho; Bo Hou; Jongchul Lim; Sanghyo Lee; Sangyeon Pak; John Hong; Paul Giraud; A. Rang Jang; Young Woo Lee; Juwon Lee; Jae Eun Jang; Henry J. Snaith; Stephen M. Morris; Jung Inn Sohn; Seungnam Cha; Jong Min Kim

doi:10.1021/acsenergylett.8b00130

Balancing Charge Carrier Transport in a Quantum Dot P-N Junction toward Hysteresis-Free High-Performance Solar Cells

Yuljae Cho, Bo Hou, Jongchul Lim, Sanghyo Lee, Sangyeon Pak, John Hong, Paul Giraud, A. Rang Jang, Young Woo Lee, Juwon Lee, Jae Eun Jang, Henry J. Snaith, Stephen M. Morris, Jung Inn Sohn, Seungnam Cha, Jong Min Kim

Department of Physics

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

45 Scopus citations

Abstract

In a quantum dot solar cell (QDSC) that has an inverted structure, the QD layers form two different junctions between the electron transport layer (ETL) and the other semiconducting QD layer. Recent work on an inverted-structure QDSC has revealed that the junction between the QD layers is the dominant junction, rather than the junction between the ETL and the QD layers, which is in contrast to the conventional wisdom. However, to date, there have been a lack of systematic studies on the role and importance of the QD heterojunction structure on the behavior of the solar cell and the resulting device performance. In this study, we have systematically controlled the structure of the QD junction to balance charge transport, which demonstrates that the position of the junction has a significant effect on the hysteresis effect, fill factor, and solar cell performance and is attributed to balanced charge transport.

Original language	English
Pages (from-to)	1036-1043
Number of pages	8
Journal	ACS Energy Letters
Volume	3
Issue number	4
DOIs	https://doi.org/10.1021/acsenergylett.8b00130
State	Published - 13 Apr 2018

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Cho, Y., Hou, B., Lim, J., Lee, S., Pak, S., Hong, J., Giraud, P., Jang, A. R., Lee, Y. W., Lee, J., Jang, J. E., Snaith, H. J., Morris, S. M., Sohn, J. I., Cha, S., & Kim, J. M. (2018). Balancing Charge Carrier Transport in a Quantum Dot P-N Junction toward Hysteresis-Free High-Performance Solar Cells. ACS Energy Letters, 3(4), 1036-1043. https://doi.org/10.1021/acsenergylett.8b00130

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title = "Balancing Charge Carrier Transport in a Quantum Dot P-N Junction toward Hysteresis-Free High-Performance Solar Cells",

abstract = "In a quantum dot solar cell (QDSC) that has an inverted structure, the QD layers form two different junctions between the electron transport layer (ETL) and the other semiconducting QD layer. Recent work on an inverted-structure QDSC has revealed that the junction between the QD layers is the dominant junction, rather than the junction between the ETL and the QD layers, which is in contrast to the conventional wisdom. However, to date, there have been a lack of systematic studies on the role and importance of the QD heterojunction structure on the behavior of the solar cell and the resulting device performance. In this study, we have systematically controlled the structure of the QD junction to balance charge transport, which demonstrates that the position of the junction has a significant effect on the hysteresis effect, fill factor, and solar cell performance and is attributed to balanced charge transport.",

author = "Yuljae Cho and Bo Hou and Jongchul Lim and Sanghyo Lee and Sangyeon Pak and John Hong and Paul Giraud and Jang, {A. Rang} and Lee, {Young Woo} and Juwon Lee and Jang, {Jae Eun} and Snaith, {Henry J.} and Morris, {Stephen M.} and Sohn, {Jung Inn} and Seungnam Cha and Kim, {Jong Min}",

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doi = "10.1021/acsenergylett.8b00130",

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T1 - Balancing Charge Carrier Transport in a Quantum Dot P-N Junction toward Hysteresis-Free High-Performance Solar Cells

AU - Cho, Yuljae

AU - Hou, Bo

AU - Lim, Jongchul

AU - Lee, Sanghyo

AU - Pak, Sangyeon

AU - Hong, John

AU - Giraud, Paul

AU - Jang, A. Rang

AU - Lee, Young Woo

AU - Lee, Juwon

AU - Jang, Jae Eun

AU - Snaith, Henry J.

AU - Morris, Stephen M.

AU - Sohn, Jung Inn

AU - Cha, Seungnam

AU - Kim, Jong Min

PY - 2018/4/13

Y1 - 2018/4/13

N2 - In a quantum dot solar cell (QDSC) that has an inverted structure, the QD layers form two different junctions between the electron transport layer (ETL) and the other semiconducting QD layer. Recent work on an inverted-structure QDSC has revealed that the junction between the QD layers is the dominant junction, rather than the junction between the ETL and the QD layers, which is in contrast to the conventional wisdom. However, to date, there have been a lack of systematic studies on the role and importance of the QD heterojunction structure on the behavior of the solar cell and the resulting device performance. In this study, we have systematically controlled the structure of the QD junction to balance charge transport, which demonstrates that the position of the junction has a significant effect on the hysteresis effect, fill factor, and solar cell performance and is attributed to balanced charge transport.

AB - In a quantum dot solar cell (QDSC) that has an inverted structure, the QD layers form two different junctions between the electron transport layer (ETL) and the other semiconducting QD layer. Recent work on an inverted-structure QDSC has revealed that the junction between the QD layers is the dominant junction, rather than the junction between the ETL and the QD layers, which is in contrast to the conventional wisdom. However, to date, there have been a lack of systematic studies on the role and importance of the QD heterojunction structure on the behavior of the solar cell and the resulting device performance. In this study, we have systematically controlled the structure of the QD junction to balance charge transport, which demonstrates that the position of the junction has a significant effect on the hysteresis effect, fill factor, and solar cell performance and is attributed to balanced charge transport.

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JO - ACS Energy Letters

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ER -

Balancing Charge Carrier Transport in a Quantum Dot P-N Junction toward Hysteresis-Free High-Performance Solar Cells

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