Surface-Engineered Graphene Quantum Dots Incorporated into Polymer Layers for High Performance Organic Photovoltaics

Jung Kyu Kim; Sang Jin Kim; Myung Jin Park; Sukang Bae; Sung Pyo Cho; Qing Guo Du; Dong Hwan Wang; Jong Hyeok Park; Byung Hee Hong

doi:10.1038/srep14276

Surface-Engineered Graphene Quantum Dots Incorporated into Polymer Layers for High Performance Organic Photovoltaics

Jung Kyu Kim, Sang Jin Kim, Myung Jin Park, Sukang Bae, Sung Pyo Cho, Qing Guo Du, Dong Hwan Wang, Jong Hyeok Park, Byung Hee Hong

Department of Chemical and Biomolecular Engineering

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

48 Citations (Scopus)

Abstract

Graphene quantum dots (GQDs), a newly emerging 0-dimensional graphene based material, have been widely exploited in optoelectronic devices due to their tunable optical and electronic properties depending on their functional groups. Moreover, the dispersibility of GQDs in common solvents depending on hydrophobicity or hydrophilicity can be controlled by chemical functionalization, which is particularly important for homogeneous incorporation into various polymer layers. Here we report that a surface-engineered GQD-incorporated polymer photovoltaic device shows enhanced power conversion efficiency (PCE), where the oxygen-related functionalization of GQDs enabled good dispersity in a PEDOT:PSS hole extraction layer, leading to significantly improved short circuit current density (J_sc) value. To maximize the PCE of the device, hydrophobic GQDs that are hydrothermally reduced (rGQD) were additionally incorporated in a bulk-heterojunction layer, which is found to promote a synergistic effect with the GQD-incorporated hole extraction layer.

Original language	English
Article number	14276
Journal	Scientific reports
Volume	5
DOIs	https://doi.org/10.1038/srep14276
Publication status	Published - 2015 Sep 22

Bibliographical note

Funding Information:
This research was supported by the Basic Science Research Program (NRF-2013R1A2A1A09014038, 2011-0030254, 2011-00006286, 2014M3A7B4051747, 2011-0017587), the Global Ph.D fellowship program (NRF-2012H1A2A1016034), the Global Research Lab (GRL) Program (2011-0021972), and the Global Frontier Research Program (2011-0031629) through the National Research Foundation of Korea (NRF) funded by the Korean government (MEST and MKE). B. H. H. appreciates the financial support from the SBS foundation. Institutional Program. S. Bae appreciates the financial support from the Korea Institute of Science and Technology (KIST) Institutional Program (2Z04420) and the Graphene Materials/Components Development Project (10044366) through the Ministry of Trade, Industry, and Energy (MOTIE), Republic of Korea.

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title = "Surface-Engineered Graphene Quantum Dots Incorporated into Polymer Layers for High Performance Organic Photovoltaics",

abstract = "Graphene quantum dots (GQDs), a newly emerging 0-dimensional graphene based material, have been widely exploited in optoelectronic devices due to their tunable optical and electronic properties depending on their functional groups. Moreover, the dispersibility of GQDs in common solvents depending on hydrophobicity or hydrophilicity can be controlled by chemical functionalization, which is particularly important for homogeneous incorporation into various polymer layers. Here we report that a surface-engineered GQD-incorporated polymer photovoltaic device shows enhanced power conversion efficiency (PCE), where the oxygen-related functionalization of GQDs enabled good dispersity in a PEDOT:PSS hole extraction layer, leading to significantly improved short circuit current density (Jsc) value. To maximize the PCE of the device, hydrophobic GQDs that are hydrothermally reduced (rGQD) were additionally incorporated in a bulk-heterojunction layer, which is found to promote a synergistic effect with the GQD-incorporated hole extraction layer.",

author = "Kim, {Jung Kyu} and Kim, {Sang Jin} and Park, {Myung Jin} and Sukang Bae and Cho, {Sung Pyo} and Du, {Qing Guo} and Wang, {Dong Hwan} and Park, {Jong Hyeok} and Hong, {Byung Hee}",

note = "Funding Information: This research was supported by the Basic Science Research Program (NRF-2013R1A2A1A09014038, 2011-0030254, 2011-00006286, 2014M3A7B4051747, 2011-0017587), the Global Ph.D fellowship program (NRF-2012H1A2A1016034), the Global Research Lab (GRL) Program (2011-0021972), and the Global Frontier Research Program (2011-0031629) through the National Research Foundation of Korea (NRF) funded by the Korean government (MEST and MKE). B. H. H. appreciates the financial support from the SBS foundation. Institutional Program. S. Bae appreciates the financial support from the Korea Institute of Science and Technology (KIST) Institutional Program (2Z04420) and the Graphene Materials/Components Development Project (10044366) through the Ministry of Trade, Industry, and Energy (MOTIE), Republic of Korea.",

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AU - Park, Jong Hyeok

AU - Hong, Byung Hee

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N2 - Graphene quantum dots (GQDs), a newly emerging 0-dimensional graphene based material, have been widely exploited in optoelectronic devices due to their tunable optical and electronic properties depending on their functional groups. Moreover, the dispersibility of GQDs in common solvents depending on hydrophobicity or hydrophilicity can be controlled by chemical functionalization, which is particularly important for homogeneous incorporation into various polymer layers. Here we report that a surface-engineered GQD-incorporated polymer photovoltaic device shows enhanced power conversion efficiency (PCE), where the oxygen-related functionalization of GQDs enabled good dispersity in a PEDOT:PSS hole extraction layer, leading to significantly improved short circuit current density (Jsc) value. To maximize the PCE of the device, hydrophobic GQDs that are hydrothermally reduced (rGQD) were additionally incorporated in a bulk-heterojunction layer, which is found to promote a synergistic effect with the GQD-incorporated hole extraction layer.

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Surface-Engineered Graphene Quantum Dots Incorporated into Polymer Layers for High Performance Organic Photovoltaics

Abstract

Bibliographical note

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