Amino-Functionalized Conjugated Polymer as an Efficient Electron Transport Layer for High-Performance Planar-Heterojunction Perovskite Solar Cells

Chen Sun; Zhihong Wu; Hin-Lap Yip; Hua Zhang; Xiao-Fang Jiang; Qifan Xue; Zhicheng Hu; Zhanhao Hu; Yan Shen; Mingkui Wang; Fei Huang; Yong Cao

doi:10.1002/aenm.201501534

Amino-Functionalized Conjugated Polymer as an Efficient Electron Transport Layer for High-Performance Planar-Heterojunction Perovskite Solar Cells

Chen Sun, Zhihong Wu, Hin-Lap Yip^*, Hua Zhang, Xiao-Fang Jiang, Qifan Xue, Zhicheng Hu, Zhanhao Hu, Yan Shen, Mingkui Wang, Fei Huang, Yong Cao

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

326 Citations (Scopus)

Abstract

An amino-functionalized copolymer with a conjugated backbone composed of fluorene, naphthalene diimide, and thiophene spacers (PFN-2TNDI) is introduced as an alternative electron transport layer (ETL) to replace the commonly used [6,6]-Phenyl-C61-butyric acid methyl ester (PCBM) in the p-i-n planar-heterojunction organometal trihalide perovskite solar cells. A combination of characterizations including photoluminescence (PL), time-resolved PL decay, Kelvin probe measurement, and impedance spectroscopy is used to study the interfacial effects induced by the new ETL. It is found that the amines on the polymer side chains not only can passivate the surface traps of perovskite to improve the electron extraction properties, they also can reduce the work function of the metal cathode by forming desired interfacial dipoles. With these dual functionalities, the resulted solar cells outperform those based on PCBM with power conversion efficiency (PCE) increased from 12.9% to 16.7% based on PFN-2TNDI. In addition to the performance enhancement, it is also found that a wide range of thicknesses of the new ETL can be applied to produce high PCE devices owing to the good electron transport property of the polymer, which offers a better processing window for potential fabrication of perovskite solar cells using large-area coating method.

Original language	English
Article number	1501534
Journal	Advanced Energy Materials
Volume	6
Issue number	5
DOIs	https://doi.org/10.1002/aenm.201501534
Publication status	Published - 9 Mar 2016
Externally published	Yes

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Research Keywords

electron transport layers
fullerenes replacement
organic conjugated polymers
perovskite solar cells
planar-heterojunction

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This output contributes to the following UN Sustainable Development Goals (SDGs)

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title = "Amino-Functionalized Conjugated Polymer as an Efficient Electron Transport Layer for High-Performance Planar-Heterojunction Perovskite Solar Cells",

abstract = "An amino-functionalized copolymer with a conjugated backbone composed of fluorene, naphthalene diimide, and thiophene spacers (PFN-2TNDI) is introduced as an alternative electron transport layer (ETL) to replace the commonly used [6,6]-Phenyl-C61-butyric acid methyl ester (PCBM) in the p-i-n planar-heterojunction organometal trihalide perovskite solar cells. A combination of characterizations including photoluminescence (PL), time-resolved PL decay, Kelvin probe measurement, and impedance spectroscopy is used to study the interfacial effects induced by the new ETL. It is found that the amines on the polymer side chains not only can passivate the surface traps of perovskite to improve the electron extraction properties, they also can reduce the work function of the metal cathode by forming desired interfacial dipoles. With these dual functionalities, the resulted solar cells outperform those based on PCBM with power conversion efficiency (PCE) increased from 12.9% to 16.7% based on PFN-2TNDI. In addition to the performance enhancement, it is also found that a wide range of thicknesses of the new ETL can be applied to produce high PCE devices owing to the good electron transport property of the polymer, which offers a better processing window for potential fabrication of perovskite solar cells using large-area coating method.",

keywords = "electron transport layers, fullerenes replacement, organic conjugated polymers, perovskite solar cells, planar-heterojunction",

author = "Chen Sun and Zhihong Wu and Hin-Lap Yip and Hua Zhang and Xiao-Fang Jiang and Qifan Xue and Zhicheng Hu and Zhanhao Hu and Yan Shen and Mingkui Wang and Fei Huang and Yong Cao",

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Amino-Functionalized Conjugated Polymer as an Efficient Electron Transport Layer for High-Performance Planar-Heterojunction Perovskite Solar Cells. / Sun, Chen; Wu, Zhihong; Yip, Hin-Lap et al.
In: Advanced Energy Materials, Vol. 6, No. 5, 1501534, 09.03.2016.

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

TY - JOUR

T1 - Amino-Functionalized Conjugated Polymer as an Efficient Electron Transport Layer for High-Performance Planar-Heterojunction Perovskite Solar Cells

AU - Sun, Chen

AU - Wu, Zhihong

AU - Yip, Hin-Lap

AU - Zhang, Hua

AU - Jiang, Xiao-Fang

AU - Xue, Qifan

AU - Hu, Zhicheng

AU - Hu, Zhanhao

AU - Shen, Yan

AU - Wang, Mingkui

AU - Huang, Fei

AU - Cao, Yong

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2016/3/9

Y1 - 2016/3/9

N2 - An amino-functionalized copolymer with a conjugated backbone composed of fluorene, naphthalene diimide, and thiophene spacers (PFN-2TNDI) is introduced as an alternative electron transport layer (ETL) to replace the commonly used [6,6]-Phenyl-C61-butyric acid methyl ester (PCBM) in the p-i-n planar-heterojunction organometal trihalide perovskite solar cells. A combination of characterizations including photoluminescence (PL), time-resolved PL decay, Kelvin probe measurement, and impedance spectroscopy is used to study the interfacial effects induced by the new ETL. It is found that the amines on the polymer side chains not only can passivate the surface traps of perovskite to improve the electron extraction properties, they also can reduce the work function of the metal cathode by forming desired interfacial dipoles. With these dual functionalities, the resulted solar cells outperform those based on PCBM with power conversion efficiency (PCE) increased from 12.9% to 16.7% based on PFN-2TNDI. In addition to the performance enhancement, it is also found that a wide range of thicknesses of the new ETL can be applied to produce high PCE devices owing to the good electron transport property of the polymer, which offers a better processing window for potential fabrication of perovskite solar cells using large-area coating method.

AB - An amino-functionalized copolymer with a conjugated backbone composed of fluorene, naphthalene diimide, and thiophene spacers (PFN-2TNDI) is introduced as an alternative electron transport layer (ETL) to replace the commonly used [6,6]-Phenyl-C61-butyric acid methyl ester (PCBM) in the p-i-n planar-heterojunction organometal trihalide perovskite solar cells. A combination of characterizations including photoluminescence (PL), time-resolved PL decay, Kelvin probe measurement, and impedance spectroscopy is used to study the interfacial effects induced by the new ETL. It is found that the amines on the polymer side chains not only can passivate the surface traps of perovskite to improve the electron extraction properties, they also can reduce the work function of the metal cathode by forming desired interfacial dipoles. With these dual functionalities, the resulted solar cells outperform those based on PCBM with power conversion efficiency (PCE) increased from 12.9% to 16.7% based on PFN-2TNDI. In addition to the performance enhancement, it is also found that a wide range of thicknesses of the new ETL can be applied to produce high PCE devices owing to the good electron transport property of the polymer, which offers a better processing window for potential fabrication of perovskite solar cells using large-area coating method.

KW - electron transport layers

KW - fullerenes replacement

KW - organic conjugated polymers

KW - perovskite solar cells

KW - planar-heterojunction

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DO - 10.1002/aenm.201501534

M3 - RGC 21 - Publication in refereed journal

SN - 1614-6832

VL - 6

JO - Advanced Energy Materials

JF - Advanced Energy Materials

IS - 5

M1 - 1501534

ER -

Amino-Functionalized Conjugated Polymer as an Efficient Electron Transport Layer for High-Performance Planar-Heterojunction Perovskite Solar Cells

Abstract

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Research Keywords

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