Cesium carbonate functionalized graphene quantum dots as stable electron-selective layer for improvement of inverted polymer solar cells

Hong Bin Yang; Yong Qiang Dong; Xizu Wang; Si Yun Khoo; Bin Liu

doi:10.1021/am404638e

Cesium carbonate functionalized graphene quantum dots as stable electron-selective layer for improvement of inverted polymer solar cells

Hong Bin Yang, Yong Qiang Dong, Xizu Wang, Si Yun Khoo, Bin Liu

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

78 Citations (Scopus)

Abstract

Solution processable inverted bulk heterojunction (BHJ) polymer solar cells (PSCs) are promising alternatives to conventional silicon solar cells because of their low cost roll-to-roll production and flexible device applications. In this work, we demonstrated that Cs₂CO₃ functionalized graphene quantum dots (GQDs-Cs₂CO₃) could be used as efficient electron-selective layers in inverted PSCs. Compared with Cs ₂CO₃ buffered devices, the GQDs-Cs₂CO ₃ buffered devices show 56% improvement in power conversion efficiency, as well as 200% enhancement in stability, due to the better electron-extraction, suppression of leakage current, and inhibition of Cs ⁺ ion diffusion at the buffer/polymer interface by GQDs-Cs ₂CO₃. This work provides a thermal-annealing-free, solution-processable method for fabricating electron-selective layer in inverted PSCs, which should be beneficial for the future development of high performance all-solution-processed or roll-to-roll processed PSCs. © 2013 American Chemical Society.

Original language	English
Pages (from-to)	1092-1099
Journal	ACS Applied Materials and Interfaces
Volume	6
Issue number	2
DOIs	https://doi.org/10.1021/am404638e
Publication status	Published - 22 Jan 2014
Externally published	Yes

Bibliographical note

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].

Research Keywords

cathode buffer
cesium carbonate
graphene
polymer solar cells
quantum dots
stability

UN SDGs

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

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10.1021/am404638e

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title = "Cesium carbonate functionalized graphene quantum dots as stable electron-selective layer for improvement of inverted polymer solar cells",

abstract = "Solution processable inverted bulk heterojunction (BHJ) polymer solar cells (PSCs) are promising alternatives to conventional silicon solar cells because of their low cost roll-to-roll production and flexible device applications. In this work, we demonstrated that Cs2CO3 functionalized graphene quantum dots (GQDs-Cs2CO3) could be used as efficient electron-selective layers in inverted PSCs. Compared with Cs 2CO3 buffered devices, the GQDs-Cs2CO 3 buffered devices show 56% improvement in power conversion efficiency, as well as 200% enhancement in stability, due to the better electron-extraction, suppression of leakage current, and inhibition of Cs + ion diffusion at the buffer/polymer interface by GQDs-Cs 2CO3. This work provides a thermal-annealing-free, solution-processable method for fabricating electron-selective layer in inverted PSCs, which should be beneficial for the future development of high performance all-solution-processed or roll-to-roll processed PSCs. {\textcopyright} 2013 American Chemical Society.",

keywords = "cathode buffer, cesium carbonate, graphene, polymer solar cells, quantum dots, stability",

author = "Yang, {Hong Bin} and Dong, {Yong Qiang} and Xizu Wang and Khoo, {Si Yun} and Bin Liu",

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Cesium carbonate functionalized graphene quantum dots as stable electron-selective layer for improvement of inverted polymer solar cells. / Yang, Hong Bin; Dong, Yong Qiang; Wang, Xizu et al.
In: ACS Applied Materials and Interfaces, Vol. 6, No. 2, 22.01.2014, p. 1092-1099.

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

TY - JOUR

T1 - Cesium carbonate functionalized graphene quantum dots as stable electron-selective layer for improvement of inverted polymer solar cells

AU - Yang, Hong Bin

AU - Dong, Yong Qiang

AU - Wang, Xizu

AU - Khoo, Si Yun

AU - Liu, Bin

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 - 2014/1/22

Y1 - 2014/1/22

N2 - Solution processable inverted bulk heterojunction (BHJ) polymer solar cells (PSCs) are promising alternatives to conventional silicon solar cells because of their low cost roll-to-roll production and flexible device applications. In this work, we demonstrated that Cs2CO3 functionalized graphene quantum dots (GQDs-Cs2CO3) could be used as efficient electron-selective layers in inverted PSCs. Compared with Cs 2CO3 buffered devices, the GQDs-Cs2CO 3 buffered devices show 56% improvement in power conversion efficiency, as well as 200% enhancement in stability, due to the better electron-extraction, suppression of leakage current, and inhibition of Cs + ion diffusion at the buffer/polymer interface by GQDs-Cs 2CO3. This work provides a thermal-annealing-free, solution-processable method for fabricating electron-selective layer in inverted PSCs, which should be beneficial for the future development of high performance all-solution-processed or roll-to-roll processed PSCs. © 2013 American Chemical Society.

AB - Solution processable inverted bulk heterojunction (BHJ) polymer solar cells (PSCs) are promising alternatives to conventional silicon solar cells because of their low cost roll-to-roll production and flexible device applications. In this work, we demonstrated that Cs2CO3 functionalized graphene quantum dots (GQDs-Cs2CO3) could be used as efficient electron-selective layers in inverted PSCs. Compared with Cs 2CO3 buffered devices, the GQDs-Cs2CO 3 buffered devices show 56% improvement in power conversion efficiency, as well as 200% enhancement in stability, due to the better electron-extraction, suppression of leakage current, and inhibition of Cs + ion diffusion at the buffer/polymer interface by GQDs-Cs 2CO3. This work provides a thermal-annealing-free, solution-processable method for fabricating electron-selective layer in inverted PSCs, which should be beneficial for the future development of high performance all-solution-processed or roll-to-roll processed PSCs. © 2013 American Chemical Society.

KW - cathode buffer

KW - cesium carbonate

KW - graphene

KW - polymer solar cells

KW - quantum dots

KW - stability

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M3 - RGC 21 - Publication in refereed journal

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JF - ACS Applied Materials and Interfaces

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Cesium carbonate functionalized graphene quantum dots as stable electron-selective layer for improvement of inverted polymer solar cells

Abstract

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Research Keywords

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