Revealing the Role of Thiocyanate for Improving the Performance of Perovskite Solar Cells

Pei Ying Lin; Chen Fu Lin; Yueh Ya Chiu; Hong Hsueh Chen; Ming Hsien Li; Rajendran Raja; Chun Sheng Wu; Cheng Hung Hou; Silver Sung-Yun Hsiao; Jing Jong Shyue; Der Chuen Lee; Sheng Zhu Ho; Yi Chun Chen; Peter Chen

doi:10.1021/acsaem.2c02291

Revealing the Role of Thiocyanate for Improving the Performance of Perovskite Solar Cells

Pei Ying Lin, Chen Fu Lin, Yueh Ya Chiu, Hong Hsueh Chen, Ming Hsien Li, Rajendran Raja, Chun Sheng Wu, Cheng Hung Hou, Silver Sung-Yun Hsiao, Jing Jong Shyue, Der Chuen Lee, Sheng Zhu Ho, Yi Chun Chen, Peter Chen

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

Abstract

The use of a pseudo-halide anion, such as thiocyanate (SCN^-), as an additive in the composition-engineered perovskite film is verified and its impact on the perovskite solar cell (PSCs) performance is investigated. The perovskite precursor added with a small amount of formamidinium thiocyanate is deposited by a one-step solution process to prepare the perovskite film. We observe a significant enlargement in domain size after the incorporation of thiocyanate ions in the perovskite film. Moreover, a trace amount of thiocyanate groups across the perovskite film measured by the time-of-flight secondary ion mass spectrometer identifies the thiocyanate existing inside the perovskite bulk, especially near the film bottom. Replacement of halide with thiocyanate groups in the perovskite framework effectively suppresses bulk recombination in the perovskite film, leading to an improvement on the open-circuit voltage (V_OC) and fill factor for the pseudo-halide-based PSCs. Our studies confirm the existence of SCN^- in the final film and the passivation effect of SCN^- for enhancing the device performance.

Original language	English
Pages (from-to)	79-88
Number of pages	10
Journal	ACS Applied Energy Materials
Volume	6
Issue number	1
DOIs	https://doi.org/10.1021/acsaem.2c02291
Publication status	Published - 2023 Jan 9

All Science Journal Classification (ASJC) codes

Chemical Engineering (miscellaneous)
Energy Engineering and Power Technology
Electrochemistry
Materials Chemistry
Electrical and Electronic Engineering

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10.1021/acsaem.2c02291

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@article{d003f7125ad541aca5d475ce92dc17ce,

title = "Revealing the Role of Thiocyanate for Improving the Performance of Perovskite Solar Cells",

abstract = "The use of a pseudo-halide anion, such as thiocyanate (SCN-), as an additive in the composition-engineered perovskite film is verified and its impact on the perovskite solar cell (PSCs) performance is investigated. The perovskite precursor added with a small amount of formamidinium thiocyanate is deposited by a one-step solution process to prepare the perovskite film. We observe a significant enlargement in domain size after the incorporation of thiocyanate ions in the perovskite film. Moreover, a trace amount of thiocyanate groups across the perovskite film measured by the time-of-flight secondary ion mass spectrometer identifies the thiocyanate existing inside the perovskite bulk, especially near the film bottom. Replacement of halide with thiocyanate groups in the perovskite framework effectively suppresses bulk recombination in the perovskite film, leading to an improvement on the open-circuit voltage (VOC) and fill factor for the pseudo-halide-based PSCs. Our studies confirm the existence of SCN- in the final film and the passivation effect of SCN- for enhancing the device performance.",

author = "Lin, {Pei Ying} and Lin, {Chen Fu} and Chiu, {Yueh Ya} and Chen, {Hong Hsueh} and Li, {Ming Hsien} and Rajendran Raja and Wu, {Chun Sheng} and Hou, {Cheng Hung} and {Sung-Yun Hsiao}, Silver and Shyue, {Jing Jong} and Lee, {Der Chuen} and Ho, {Sheng Zhu} and Chen, {Yi Chun} and Peter Chen",

note = "Funding Information: The authors are grateful to the research grant from the Ministry of Science and Technology of Taiwan (MOST 107-2221-E-006-190-MY3, MOST 109-3116-F-006-001, MOST 108-2218-E-006-043-MY3, MOST 109-2918-I-006-016, MOST 109-2927-I-006-502, MOST 109-2222-E-260-001-MY3, and MOST 110-2221-E-006-200). This work was financially supported by the Hierarchical Green-Energy Materials (Hi-GEM) Research Center, from The Featured Areas Research Center Program within the framework of the Higher Education Sprout Project by the Ministry of Education (MOE) in Taiwan. This research was supported in part by Higher Education Sprout Project, Ministry of Education to the Headquarter of University Advancement at National Cheng Kung University (NCKU). The authors gratefully acknowledge the use of EM003600 of MOST 106-2731-M-006-001 equipment belonging to the Core Facility Center of National Cheng Kung University. Publisher Copyright: {\textcopyright} 2022 American Chemical Society.",

year = "2023",

month = jan,

day = "9",

doi = "10.1021/acsaem.2c02291",

language = "English",

volume = "6",

pages = "79--88",

journal = "ACS Applied Energy Materials",

issn = "2574-0962",

publisher = "American Chemical Society",

number = "1",

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TY - JOUR

T1 - Revealing the Role of Thiocyanate for Improving the Performance of Perovskite Solar Cells

AU - Lin, Pei Ying

AU - Lin, Chen Fu

AU - Chiu, Yueh Ya

AU - Chen, Hong Hsueh

AU - Li, Ming Hsien

AU - Raja, Rajendran

AU - Wu, Chun Sheng

AU - Hou, Cheng Hung

AU - Sung-Yun Hsiao, Silver

AU - Shyue, Jing Jong

AU - Lee, Der Chuen

AU - Ho, Sheng Zhu

AU - Chen, Yi Chun

AU - Chen, Peter

N1 - Funding Information: The authors are grateful to the research grant from the Ministry of Science and Technology of Taiwan (MOST 107-2221-E-006-190-MY3, MOST 109-3116-F-006-001, MOST 108-2218-E-006-043-MY3, MOST 109-2918-I-006-016, MOST 109-2927-I-006-502, MOST 109-2222-E-260-001-MY3, and MOST 110-2221-E-006-200). This work was financially supported by the Hierarchical Green-Energy Materials (Hi-GEM) Research Center, from The Featured Areas Research Center Program within the framework of the Higher Education Sprout Project by the Ministry of Education (MOE) in Taiwan. This research was supported in part by Higher Education Sprout Project, Ministry of Education to the Headquarter of University Advancement at National Cheng Kung University (NCKU). The authors gratefully acknowledge the use of EM003600 of MOST 106-2731-M-006-001 equipment belonging to the Core Facility Center of National Cheng Kung University. Publisher Copyright: © 2022 American Chemical Society.

PY - 2023/1/9

Y1 - 2023/1/9

N2 - The use of a pseudo-halide anion, such as thiocyanate (SCN-), as an additive in the composition-engineered perovskite film is verified and its impact on the perovskite solar cell (PSCs) performance is investigated. The perovskite precursor added with a small amount of formamidinium thiocyanate is deposited by a one-step solution process to prepare the perovskite film. We observe a significant enlargement in domain size after the incorporation of thiocyanate ions in the perovskite film. Moreover, a trace amount of thiocyanate groups across the perovskite film measured by the time-of-flight secondary ion mass spectrometer identifies the thiocyanate existing inside the perovskite bulk, especially near the film bottom. Replacement of halide with thiocyanate groups in the perovskite framework effectively suppresses bulk recombination in the perovskite film, leading to an improvement on the open-circuit voltage (VOC) and fill factor for the pseudo-halide-based PSCs. Our studies confirm the existence of SCN- in the final film and the passivation effect of SCN- for enhancing the device performance.

AB - The use of a pseudo-halide anion, such as thiocyanate (SCN-), as an additive in the composition-engineered perovskite film is verified and its impact on the perovskite solar cell (PSCs) performance is investigated. The perovskite precursor added with a small amount of formamidinium thiocyanate is deposited by a one-step solution process to prepare the perovskite film. We observe a significant enlargement in domain size after the incorporation of thiocyanate ions in the perovskite film. Moreover, a trace amount of thiocyanate groups across the perovskite film measured by the time-of-flight secondary ion mass spectrometer identifies the thiocyanate existing inside the perovskite bulk, especially near the film bottom. Replacement of halide with thiocyanate groups in the perovskite framework effectively suppresses bulk recombination in the perovskite film, leading to an improvement on the open-circuit voltage (VOC) and fill factor for the pseudo-halide-based PSCs. Our studies confirm the existence of SCN- in the final film and the passivation effect of SCN- for enhancing the device performance.

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U2 - 10.1021/acsaem.2c02291

DO - 10.1021/acsaem.2c02291

M3 - Article

AN - SCOPUS:85144431310

SN - 2574-0962

VL - 6

SP - 79

EP - 88

JO - ACS Applied Energy Materials

JF - ACS Applied Energy Materials

IS - 1

ER -

Revealing the Role of Thiocyanate for Improving the Performance of Perovskite Solar Cells

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