Synergistic Effects of Lead Thiocyanate Additive and Solvent Annealing on the Performance of Wide-Bandgap Perovskite Solar Cells

Kai Zhu; Yue Yu; Changlei Wang; Corey Grice; Niraj Shrestha; Dewei Zhao; Weiqiang Liao; Lei Guan; Rasha Awni; Weiwei Meng; Alexander Cimaroli; Randy Ellingson; Yanfa Yan

doi:10.1021/acsenergylett.7b00278

Synergistic Effects of Lead Thiocyanate Additive and Solvent Annealing on the Performance of Wide-Bandgap Perovskite Solar Cells

Kai Zhu, Yue Yu, Changlei Wang, Corey Grice, Niraj Shrestha, Dewei Zhao, Weiqiang Liao, Lei Guan, Rasha Awni, Weiwei Meng, Alexander Cimaroli, Randy Ellingson, Yanfa Yan

Chemistry and Nanoscience

University of Toledo

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

225 Scopus Citations

Abstract

We show that the cooperation of lead thiocyanate additive and a solvent annealing process can effectively increase the grain size of mixed-cation lead mixed-halide perovskite thin films while avoiding excess lead iodide formation. As a result, the average grain size of the wide-bandgap mixed-cation lead perovskite thin films increases from 66 ± 24 to 1036 ± 111 nm, and the mean carrier lifetime shows a more than 3-fold increase, from 330 ns to over 1000 ns. Consequently, the average open-circuit voltage of wide-bandgap perovskite solar cells increases by 80 (70) mV, and the average power conversion efficiency (PCE) increases from 13.44 ± 0.48 (11.75 ± 0.34) to 17.68 ± 0.36 (15.58 ± 0.55)% when measured under reverse (forward) voltage scans. The best-performing wide-bandgap perovskite solar cell, with a bandgap of 1.75 eV, achieves a stabilized PCE of 17.18%.

Original language	American English
Pages (from-to)	1177-1182
Number of pages	6
Journal	ACS Energy Letters
Volume	2
Issue number	5
DOIs	https://doi.org/10.1021/acsenergylett.7b00278 https://doi.org/10.1021/acsenergylett.7b00278
State	Published - 12 May 2017

Bibliographical note

Publisher Copyright:
© 2017 American Chemical Society.

NREL Publication Number

NREL/JA-5900-68289

Keywords

annealing
lead thiocyanate additive
perovskite solar cells
thin films

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Zhu, K., Yu, Y., Wang, C., Grice, C., Shrestha, N., Zhao, D., Liao, W., Guan, L., Awni, R., Meng, W., Cimaroli, A., Ellingson, R., & Yan, Y. (2017). Synergistic Effects of Lead Thiocyanate Additive and Solvent Annealing on the Performance of Wide-Bandgap Perovskite Solar Cells. ACS Energy Letters, 2(5), 1177-1182. https://doi.org/10.1021/acsenergylett.7b00278, https://doi.org/10.1021/acsenergylett.7b00278

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title = "Synergistic Effects of Lead Thiocyanate Additive and Solvent Annealing on the Performance of Wide-Bandgap Perovskite Solar Cells",

abstract = "We show that the cooperation of lead thiocyanate additive and a solvent annealing process can effectively increase the grain size of mixed-cation lead mixed-halide perovskite thin films while avoiding excess lead iodide formation. As a result, the average grain size of the wide-bandgap mixed-cation lead perovskite thin films increases from 66 ± 24 to 1036 ± 111 nm, and the mean carrier lifetime shows a more than 3-fold increase, from 330 ns to over 1000 ns. Consequently, the average open-circuit voltage of wide-bandgap perovskite solar cells increases by 80 (70) mV, and the average power conversion efficiency (PCE) increases from 13.44 ± 0.48 (11.75 ± 0.34) to 17.68 ± 0.36 (15.58 ± 0.55)\% when measured under reverse (forward) voltage scans. The best-performing wide-bandgap perovskite solar cell, with a bandgap of 1.75 eV, achieves a stabilized PCE of 17.18\%.",

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author = "Kai Zhu and Yue Yu and Changlei Wang and Corey Grice and Niraj Shrestha and Dewei Zhao and Weiqiang Liao and Lei Guan and Rasha Awni and Weiwei Meng and Alexander Cimaroli and Randy Ellingson and Yanfa Yan",

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Zhu, K, Yu, Y, Wang, C, Grice, C, Shrestha, N, Zhao, D, Liao, W, Guan, L, Awni, R, Meng, W, Cimaroli, A, Ellingson, R & Yan, Y 2017, 'Synergistic Effects of Lead Thiocyanate Additive and Solvent Annealing on the Performance of Wide-Bandgap Perovskite Solar Cells', ACS Energy Letters, vol. 2, no. 5, pp. 1177-1182. https://doi.org/10.1021/acsenergylett.7b00278, https://doi.org/10.1021/acsenergylett.7b00278

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T1 - Synergistic Effects of Lead Thiocyanate Additive and Solvent Annealing on the Performance of Wide-Bandgap Perovskite Solar Cells

AU - Zhu, Kai

AU - Yu, Yue

AU - Wang, Changlei

AU - Grice, Corey

AU - Shrestha, Niraj

AU - Zhao, Dewei

AU - Liao, Weiqiang

AU - Guan, Lei

AU - Awni, Rasha

AU - Meng, Weiwei

AU - Cimaroli, Alexander

AU - Ellingson, Randy

AU - Yan, Yanfa

PY - 2017/5/12

Y1 - 2017/5/12

N2 - We show that the cooperation of lead thiocyanate additive and a solvent annealing process can effectively increase the grain size of mixed-cation lead mixed-halide perovskite thin films while avoiding excess lead iodide formation. As a result, the average grain size of the wide-bandgap mixed-cation lead perovskite thin films increases from 66 ± 24 to 1036 ± 111 nm, and the mean carrier lifetime shows a more than 3-fold increase, from 330 ns to over 1000 ns. Consequently, the average open-circuit voltage of wide-bandgap perovskite solar cells increases by 80 (70) mV, and the average power conversion efficiency (PCE) increases from 13.44 ± 0.48 (11.75 ± 0.34) to 17.68 ± 0.36 (15.58 ± 0.55)% when measured under reverse (forward) voltage scans. The best-performing wide-bandgap perovskite solar cell, with a bandgap of 1.75 eV, achieves a stabilized PCE of 17.18%.

AB - We show that the cooperation of lead thiocyanate additive and a solvent annealing process can effectively increase the grain size of mixed-cation lead mixed-halide perovskite thin films while avoiding excess lead iodide formation. As a result, the average grain size of the wide-bandgap mixed-cation lead perovskite thin films increases from 66 ± 24 to 1036 ± 111 nm, and the mean carrier lifetime shows a more than 3-fold increase, from 330 ns to over 1000 ns. Consequently, the average open-circuit voltage of wide-bandgap perovskite solar cells increases by 80 (70) mV, and the average power conversion efficiency (PCE) increases from 13.44 ± 0.48 (11.75 ± 0.34) to 17.68 ± 0.36 (15.58 ± 0.55)% when measured under reverse (forward) voltage scans. The best-performing wide-bandgap perovskite solar cell, with a bandgap of 1.75 eV, achieves a stabilized PCE of 17.18%.

KW - annealing

KW - lead thiocyanate additive

KW - perovskite solar cells

KW - thin films

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SN - 2380-8195

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EP - 1182

JO - ACS Energy Letters

JF - ACS Energy Letters

IS - 5

ER -

Synergistic Effects of Lead Thiocyanate Additive and Solvent Annealing on the Performance of Wide-Bandgap Perovskite Solar Cells

Abstract

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Keywords

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