In Situ Back-Contact Passivation Improves Photovoltage and Fill Factor in Perovskite Solar Cells

Furui Tan; Hairen Tan; Makhsud I. Saidaminov; Mingyang Wei; Mengxia Liu; Anyi Mei; Peicheng Li; Bowen Zhang; Chih Shan Tan; Xiwen Gong; Yongbiao Zhao; Ahmad R. Kirmani; Ziru Huang; James Z. Fan; Rafael Quintero-Bermudez; Junghwan Kim; Yicheng Zhao; Oleksandr Voznyy; Yueyue Gao; Feng Zhang; Lee J. Richter; Zheng Hong Lu; Weifeng Zhang; Edward H. Sargent

doi:10.1002/adma.201807435

In Situ Back-Contact Passivation Improves Photovoltage and Fill Factor in Perovskite Solar Cells

Furui Tan, Hairen Tan^*, Makhsud I. Saidaminov, Mingyang Wei, Mengxia Liu, Anyi Mei, Peicheng Li, Bowen Zhang, Chih Shan Tan, Xiwen Gong, Yongbiao Zhao, Ahmad R. Kirmani, Ziru Huang, James Z. Fan, Rafael Quintero-Bermudez, Junghwan Kim, Yicheng Zhao, Oleksandr Voznyy, Yueyue Gao, Feng ZhangLee J. Richter, Zheng Hong Lu, Weifeng Zhang, Edward H. Sargent

^*Corresponding author for this work

Institute of Electronics

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

59 Scopus citations

Abstract

Organic–inorganic hybrid perovskite solar cells (PSCs) have seen a rapid rise in power conversion efficiencies in recent years; however, they still suffer from interfacial recombination and charge extraction losses at interfaces between the perovskite absorber and the charge–transport layers. Here, in situ back-contact passivation (BCP) that reduces interfacial and extraction losses between the perovskite absorber and the hole transport layer (HTL) is reported. A thin layer of nondoped semiconducting polymer at the perovskite/HTL interface is introduced and it is shown that the use of the semiconductor polymer permits—in contrast with previously studied insulator-based passivants—the use of a relatively thick passivating layer. It is shown that a flat-band alignment between the perovskite and polymer passivation layers achieves a high photovoltage and fill factor: the resultant BCP enables a photovoltage of 1.15 V and a fill factor of 83% in 1.53 eV bandgap PSCs, leading to an efficiency of 21.6% in planar solar cells.

Original language	English
Article number	1807435
Journal	Advanced Materials
Volume	31
Issue number	14
DOIs	https://doi.org/10.1002/adma.201807435
State	Published - 5 Apr 2019

Keywords

band alignment
passivation
perovskite solar cells
semiconducting polymers

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Tan, F., Tan, H., Saidaminov, M. I., Wei, M., Liu, M., Mei, A., Li, P., Zhang, B., Tan, C. S., Gong, X., Zhao, Y., Kirmani, A. R., Huang, Z., Fan, J. Z., Quintero-Bermudez, R., Kim, J., Zhao, Y., Voznyy, O., Gao, Y., ... Sargent, E. H. (2019). In Situ Back-Contact Passivation Improves Photovoltage and Fill Factor in Perovskite Solar Cells. Advanced Materials, 31(14), [1807435]. https://doi.org/10.1002/adma.201807435

Tan, Furui ; Tan, Hairen ; Saidaminov, Makhsud I. ; Wei, Mingyang ; Liu, Mengxia ; Mei, Anyi ; Li, Peicheng ; Zhang, Bowen ; Tan, Chih Shan ; Gong, Xiwen ; Zhao, Yongbiao ; Kirmani, Ahmad R. ; Huang, Ziru ; Fan, James Z. ; Quintero-Bermudez, Rafael ; Kim, Junghwan ; Zhao, Yicheng ; Voznyy, Oleksandr ; Gao, Yueyue ; Zhang, Feng ; Richter, Lee J. ; Lu, Zheng Hong ; Zhang, Weifeng ; Sargent, Edward H. / In Situ Back-Contact Passivation Improves Photovoltage and Fill Factor in Perovskite Solar Cells. In: Advanced Materials. 2019 ; Vol. 31, No. 14.

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title = "In Situ Back-Contact Passivation Improves Photovoltage and Fill Factor in Perovskite Solar Cells",

abstract = "Organic–inorganic hybrid perovskite solar cells (PSCs) have seen a rapid rise in power conversion efficiencies in recent years; however, they still suffer from interfacial recombination and charge extraction losses at interfaces between the perovskite absorber and the charge–transport layers. Here, in situ back-contact passivation (BCP) that reduces interfacial and extraction losses between the perovskite absorber and the hole transport layer (HTL) is reported. A thin layer of nondoped semiconducting polymer at the perovskite/HTL interface is introduced and it is shown that the use of the semiconductor polymer permits—in contrast with previously studied insulator-based passivants—the use of a relatively thick passivating layer. It is shown that a flat-band alignment between the perovskite and polymer passivation layers achieves a high photovoltage and fill factor: the resultant BCP enables a photovoltage of 1.15 V and a fill factor of 83% in 1.53 eV bandgap PSCs, leading to an efficiency of 21.6% in planar solar cells.",

keywords = "band alignment, passivation, perovskite solar cells, semiconducting polymers",

author = "Furui Tan and Hairen Tan and Saidaminov, {Makhsud I.} and Mingyang Wei and Mengxia Liu and Anyi Mei and Peicheng Li and Bowen Zhang and Tan, {Chih Shan} and Xiwen Gong and Yongbiao Zhao and Kirmani, {Ahmad R.} and Ziru Huang and Fan, {James Z.} and Rafael Quintero-Bermudez and Junghwan Kim and Yicheng Zhao and Oleksandr Voznyy and Yueyue Gao and Feng Zhang and Richter, {Lee J.} and Lu, {Zheng Hong} and Weifeng Zhang and Sargent, {Edward H.}",

year = "2019",

month = apr,

day = "5",

doi = "10.1002/adma.201807435",

language = "English",

volume = "31",

journal = "Advanced Materials",

issn = "0935-9648",

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Tan, F, Tan, H, Saidaminov, MI, Wei, M, Liu, M, Mei, A, Li, P, Zhang, B, Tan, CS, Gong, X, Zhao, Y, Kirmani, AR, Huang, Z, Fan, JZ, Quintero-Bermudez, R, Kim, J, Zhao, Y, Voznyy, O, Gao, Y, Zhang, F, Richter, LJ, Lu, ZH, Zhang, W & Sargent, EH 2019, 'In Situ Back-Contact Passivation Improves Photovoltage and Fill Factor in Perovskite Solar Cells', Advanced Materials, vol. 31, no. 14, 1807435. https://doi.org/10.1002/adma.201807435

In Situ Back-Contact Passivation Improves Photovoltage and Fill Factor in Perovskite Solar Cells. / Tan, Furui; Tan, Hairen; Saidaminov, Makhsud I.; Wei, Mingyang; Liu, Mengxia; Mei, Anyi; Li, Peicheng; Zhang, Bowen; Tan, Chih Shan; Gong, Xiwen; Zhao, Yongbiao; Kirmani, Ahmad R.; Huang, Ziru; Fan, James Z.; Quintero-Bermudez, Rafael; Kim, Junghwan; Zhao, Yicheng; Voznyy, Oleksandr; Gao, Yueyue; Zhang, Feng; Richter, Lee J.; Lu, Zheng Hong; Zhang, Weifeng; Sargent, Edward H.

In: Advanced Materials, Vol. 31, No. 14, 1807435, 05.04.2019.

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

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AU - Tan, Furui

AU - Tan, Hairen

AU - Saidaminov, Makhsud I.

AU - Wei, Mingyang

AU - Liu, Mengxia

AU - Mei, Anyi

AU - Li, Peicheng

AU - Zhang, Bowen

AU - Tan, Chih Shan

AU - Gong, Xiwen

AU - Zhao, Yongbiao

AU - Kirmani, Ahmad R.

AU - Huang, Ziru

AU - Fan, James Z.

AU - Quintero-Bermudez, Rafael

AU - Kim, Junghwan

AU - Zhao, Yicheng

AU - Voznyy, Oleksandr

AU - Gao, Yueyue

AU - Zhang, Feng

AU - Richter, Lee J.

AU - Lu, Zheng Hong

AU - Zhang, Weifeng

AU - Sargent, Edward H.

PY - 2019/4/5

Y1 - 2019/4/5

N2 - Organic–inorganic hybrid perovskite solar cells (PSCs) have seen a rapid rise in power conversion efficiencies in recent years; however, they still suffer from interfacial recombination and charge extraction losses at interfaces between the perovskite absorber and the charge–transport layers. Here, in situ back-contact passivation (BCP) that reduces interfacial and extraction losses between the perovskite absorber and the hole transport layer (HTL) is reported. A thin layer of nondoped semiconducting polymer at the perovskite/HTL interface is introduced and it is shown that the use of the semiconductor polymer permits—in contrast with previously studied insulator-based passivants—the use of a relatively thick passivating layer. It is shown that a flat-band alignment between the perovskite and polymer passivation layers achieves a high photovoltage and fill factor: the resultant BCP enables a photovoltage of 1.15 V and a fill factor of 83% in 1.53 eV bandgap PSCs, leading to an efficiency of 21.6% in planar solar cells.

AB - Organic–inorganic hybrid perovskite solar cells (PSCs) have seen a rapid rise in power conversion efficiencies in recent years; however, they still suffer from interfacial recombination and charge extraction losses at interfaces between the perovskite absorber and the charge–transport layers. Here, in situ back-contact passivation (BCP) that reduces interfacial and extraction losses between the perovskite absorber and the hole transport layer (HTL) is reported. A thin layer of nondoped semiconducting polymer at the perovskite/HTL interface is introduced and it is shown that the use of the semiconductor polymer permits—in contrast with previously studied insulator-based passivants—the use of a relatively thick passivating layer. It is shown that a flat-band alignment between the perovskite and polymer passivation layers achieves a high photovoltage and fill factor: the resultant BCP enables a photovoltage of 1.15 V and a fill factor of 83% in 1.53 eV bandgap PSCs, leading to an efficiency of 21.6% in planar solar cells.

KW - band alignment

KW - passivation

KW - perovskite solar cells

KW - semiconducting polymers

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