Perovskite Solar Cells Employing Copper Phthalocyanine Hole-Transport Material with an Efficiency over 20% and Excellent Thermal Stability

The Duong; Jun Peng; Daniel Walter; Jin Xiang; Heping Shen; Dipankar Chugh; Mark Lockrey; Dingyong Zhong; Juntao Li; Klaus Weber; Thomas P. White; Kylie R. Catchpole

doi:10.1021/acsenergylett.8b01483

Perovskite Solar Cells Employing Copper Phthalocyanine Hole-Transport Material with an Efficiency over 20% and Excellent Thermal Stability

The Duong^*, Jun Peng, Daniel Walter, Jin Xiang, Heping Shen, Dipankar Chugh, Mark Lockrey, Dingyong Zhong, Juntao Li, Klaus Weber, Thomas P. White, Kylie R. Catchpole

^*Corresponding author for this work

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

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Abstract

We investigate the properties of an inexpensive hole-transporting material (HTM), copper phthalocyanine (CuPc), deposited by a solution-processing method in perovskite solar cells (PSCs). Cracks are found to be abundant on the as-deposited CuPc films, which lead to serious shunts and interface recombination. Surprisingly, shunts and interface recombination are significantly reduced and cell performance is greatly improved after heat treatment at 85 °C. We find that the enhancement is due to heat-induced migration of Au particles away from the cracks. Furthermore, Au is found to dope the CuPc film, and the doping effect is greatly enhanced by the heat treatment. Using CuPc and quadruple-cation perovskite, an efficiency of over 20% and negligible hysteresis is achieved after the heat treatment, which is the highest value reported for this structure. Additionally, PSCs employing CuPc and dual-cation perovskite show excellent thermal stability after >2000 h at 85 °C and good light stability at 25 °C.

Original language	English
Pages (from-to)	2441-2448
Number of pages	8
Journal	ACS Energy Letters
Volume	3
Issue number	10
DOIs	https://doi.org/10.1021/acsenergylett.8b01483
Publication status	Published - 12 Oct 2018

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Duong, T., Peng, J., Walter, D., Xiang, J., Shen, H., Chugh, D., Lockrey, M., Zhong, D., Li, J., Weber, K., White, T. P., & Catchpole, K. R. (2018). Perovskite Solar Cells Employing Copper Phthalocyanine Hole-Transport Material with an Efficiency over 20% and Excellent Thermal Stability. ACS Energy Letters, 3(10), 2441-2448. https://doi.org/10.1021/acsenergylett.8b01483

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title = "Perovskite Solar Cells Employing Copper Phthalocyanine Hole-Transport Material with an Efficiency over 20% and Excellent Thermal Stability",

abstract = "We investigate the properties of an inexpensive hole-transporting material (HTM), copper phthalocyanine (CuPc), deposited by a solution-processing method in perovskite solar cells (PSCs). Cracks are found to be abundant on the as-deposited CuPc films, which lead to serious shunts and interface recombination. Surprisingly, shunts and interface recombination are significantly reduced and cell performance is greatly improved after heat treatment at 85 °C. We find that the enhancement is due to heat-induced migration of Au particles away from the cracks. Furthermore, Au is found to dope the CuPc film, and the doping effect is greatly enhanced by the heat treatment. Using CuPc and quadruple-cation perovskite, an efficiency of over 20% and negligible hysteresis is achieved after the heat treatment, which is the highest value reported for this structure. Additionally, PSCs employing CuPc and dual-cation perovskite show excellent thermal stability after >2000 h at 85 °C and good light stability at 25 °C.",

author = "The Duong and Jun Peng and Daniel Walter and Jin Xiang and Heping Shen and Dipankar Chugh and Mark Lockrey and Dingyong Zhong and Juntao Li and Klaus Weber and White, {Thomas P.} and Catchpole, {Kylie R.}",

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AU - Shen, Heping

AU - Chugh, Dipankar

AU - Lockrey, Mark

AU - Zhong, Dingyong

AU - Li, Juntao

AU - Weber, Klaus

AU - White, Thomas P.

AU - Catchpole, Kylie R.

PY - 2018/10/12

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N2 - We investigate the properties of an inexpensive hole-transporting material (HTM), copper phthalocyanine (CuPc), deposited by a solution-processing method in perovskite solar cells (PSCs). Cracks are found to be abundant on the as-deposited CuPc films, which lead to serious shunts and interface recombination. Surprisingly, shunts and interface recombination are significantly reduced and cell performance is greatly improved after heat treatment at 85 °C. We find that the enhancement is due to heat-induced migration of Au particles away from the cracks. Furthermore, Au is found to dope the CuPc film, and the doping effect is greatly enhanced by the heat treatment. Using CuPc and quadruple-cation perovskite, an efficiency of over 20% and negligible hysteresis is achieved after the heat treatment, which is the highest value reported for this structure. Additionally, PSCs employing CuPc and dual-cation perovskite show excellent thermal stability after >2000 h at 85 °C and good light stability at 25 °C.

AB - We investigate the properties of an inexpensive hole-transporting material (HTM), copper phthalocyanine (CuPc), deposited by a solution-processing method in perovskite solar cells (PSCs). Cracks are found to be abundant on the as-deposited CuPc films, which lead to serious shunts and interface recombination. Surprisingly, shunts and interface recombination are significantly reduced and cell performance is greatly improved after heat treatment at 85 °C. We find that the enhancement is due to heat-induced migration of Au particles away from the cracks. Furthermore, Au is found to dope the CuPc film, and the doping effect is greatly enhanced by the heat treatment. Using CuPc and quadruple-cation perovskite, an efficiency of over 20% and negligible hysteresis is achieved after the heat treatment, which is the highest value reported for this structure. Additionally, PSCs employing CuPc and dual-cation perovskite show excellent thermal stability after >2000 h at 85 °C and good light stability at 25 °C.

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JO - ACS Energy Letters

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Perovskite Solar Cells Employing Copper Phthalocyanine Hole-Transport Material with an Efficiency over 20% and Excellent Thermal Stability

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