Graphene quantum dots-incorporated cathode buffer for improvement of inverted polymer solar cells

Hong Bin Yang; Yong Qian Dong; Xizu Wang; Si Yun Khoo; Bin Liu; Chang Ming Li

doi:10.1016/j.solmat.2013.05.060

Graphene quantum dots-incorporated cathode buffer for improvement of inverted polymer solar cells

Hong Bin Yang, Yong Qian Dong, Xizu Wang, Si Yun Khoo, Bin Liu, Chang Ming Li

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

56 Citations (Scopus)

Abstract

Graphene quantum dots (GQDs) are an emerging class of nanomaterials with unique photonic and electric properties. In this study, GQDs were prepared by a facile, inexpensive and high-yield hydrothermal method and were further used as a cathode buffer additive for inverted polymer solar cells due to a wide band gap (~3.3 eV) and well-matched energy level between GQDs-cesium carbonate (GQDs-Cs₂CO₃) modified indium tin oxide (3.8 eV) and high occupied molecular orbit of [6,6]-phenyl-C61-butyric acid methyl ester (3.7 eV). In comparison to inverted polymer solar cells using cesium carbonate (Cs ₂CO₃) buffer layer, the power conversion efficiency of GQDs-Cs₂CO₃ based device showed 22% enhancement from 2.59% to 3.17% as a result of enhanced exciton dissociation and suppressed free charge recombination at cathode/polymer active layer interface by GQDs. This work provides a new application of GQDs in organic electronic devices. © 2013 Elsevier B.V.

Original language	English
Pages (from-to)	214-218
Journal	Solar Energy Materials and Solar Cells
Volume	117
DOIs	https://doi.org/10.1016/j.solmat.2013.05.060
Publication status	Published - 2013
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

Cesium carbonate
Charge recombination
Exciton dissociation
Graphene
Organic solar cells
Quantum dots

UN SDGs

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

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title = "Graphene quantum dots-incorporated cathode buffer for improvement of inverted polymer solar cells",

abstract = "Graphene quantum dots (GQDs) are an emerging class of nanomaterials with unique photonic and electric properties. In this study, GQDs were prepared by a facile, inexpensive and high-yield hydrothermal method and were further used as a cathode buffer additive for inverted polymer solar cells due to a wide band gap (~3.3 eV) and well-matched energy level between GQDs-cesium carbonate (GQDs-Cs2CO3) modified indium tin oxide (3.8 eV) and high occupied molecular orbit of [6,6]-phenyl-C61-butyric acid methyl ester (3.7 eV). In comparison to inverted polymer solar cells using cesium carbonate (Cs 2CO3) buffer layer, the power conversion efficiency of GQDs-Cs2CO3 based device showed 22% enhancement from 2.59% to 3.17% as a result of enhanced exciton dissociation and suppressed free charge recombination at cathode/polymer active layer interface by GQDs. This work provides a new application of GQDs in organic electronic devices. {\textcopyright} 2013 Elsevier B.V.",

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journal = "Solar Energy Materials and Solar Cells",

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TY - JOUR

T1 - Graphene quantum dots-incorporated cathode buffer for improvement of inverted polymer solar cells

AU - Bin Yang, Hong

AU - Qian Dong, Yong

AU - Wang, Xizu

AU - Yun Khoo, Si

AU - Liu, Bin

AU - Ming Li, Chang

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].

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N2 - Graphene quantum dots (GQDs) are an emerging class of nanomaterials with unique photonic and electric properties. In this study, GQDs were prepared by a facile, inexpensive and high-yield hydrothermal method and were further used as a cathode buffer additive for inverted polymer solar cells due to a wide band gap (~3.3 eV) and well-matched energy level between GQDs-cesium carbonate (GQDs-Cs2CO3) modified indium tin oxide (3.8 eV) and high occupied molecular orbit of [6,6]-phenyl-C61-butyric acid methyl ester (3.7 eV). In comparison to inverted polymer solar cells using cesium carbonate (Cs 2CO3) buffer layer, the power conversion efficiency of GQDs-Cs2CO3 based device showed 22% enhancement from 2.59% to 3.17% as a result of enhanced exciton dissociation and suppressed free charge recombination at cathode/polymer active layer interface by GQDs. This work provides a new application of GQDs in organic electronic devices. © 2013 Elsevier B.V.

AB - Graphene quantum dots (GQDs) are an emerging class of nanomaterials with unique photonic and electric properties. In this study, GQDs were prepared by a facile, inexpensive and high-yield hydrothermal method and were further used as a cathode buffer additive for inverted polymer solar cells due to a wide band gap (~3.3 eV) and well-matched energy level between GQDs-cesium carbonate (GQDs-Cs2CO3) modified indium tin oxide (3.8 eV) and high occupied molecular orbit of [6,6]-phenyl-C61-butyric acid methyl ester (3.7 eV). In comparison to inverted polymer solar cells using cesium carbonate (Cs 2CO3) buffer layer, the power conversion efficiency of GQDs-Cs2CO3 based device showed 22% enhancement from 2.59% to 3.17% as a result of enhanced exciton dissociation and suppressed free charge recombination at cathode/polymer active layer interface by GQDs. This work provides a new application of GQDs in organic electronic devices. © 2013 Elsevier B.V.

KW - Cesium carbonate

KW - Charge recombination

KW - Exciton dissociation

KW - Graphene

KW - Organic solar cells

KW - Quantum dots

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DO - 10.1016/j.solmat.2013.05.060

M3 - RGC 21 - Publication in refereed journal

SN - 0927-0248

VL - 117

SP - 214

EP - 218

JO - Solar Energy Materials and Solar Cells

JF - Solar Energy Materials and Solar Cells

ER -

Graphene quantum dots-incorporated cathode buffer for improvement of inverted polymer solar cells

Abstract

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Research Keywords

UN SDGs

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