High power efficiency tandem organic light-emitting diodes based on bulk heterojunction organic bipolar charge generation layer

Yonghua Chen; Jiangshan Chen; Dongge Ma; Donghang Yan; Lixiang Wang; Furong Zhu

doi:10.1063/1.3599557

High power efficiency tandem organic light-emitting diodes based on bulk heterojunction organic bipolar charge generation layer

Yonghua Chen^*, Jiangshan Chen, Dongge Ma, Donghang Yan, Lixiang Wang, Furong Zhu

^*Corresponding author for this work

Department of Physics

Research output: Contribution to journal › Journal article › peer-review

89 Citations (Scopus)

Abstract

The significant enhancement in power efficiency of tandem organic light-emitting diodes (OLEDs) was achieved using bulk heterojunction organic bipolar charge generation layer (CGL), consisted of zinc phthalocyanine (ZnPc): fullerene (C₆₀) blend. In addition to a significant enhancement in luminance and current efficiency this work yielded a maximum power efficiency of 21 lm W^-1 for a tandem OLED, notably almost two times higher than that of a single-unit device, with a maximum power efficiency of 10.1 lm W ^-1. The enhancement in power efficiency at higher luminance is also over 50%. The remarkable enhancement in power efficiency has been attributed to the effective charge generation, transport and extraction due to the presence of interface-modified ZnPc: C₆₀ CGL in tandem OLEDs. Our results demonstrate that the bulk heterojunction, consisting of two matched n- and p-type organic semiconductors, is a promising bipolar CGL for high power efficiency tandem OLEDs.

Original language	English
Article number	243309
Journal	Applied Physics Letters
Volume	98
Issue number	24
DOIs	https://doi.org/10.1063/1.3599557
Publication status	Published - 13 Jun 2011

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Physics and Astronomy (miscellaneous)

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@article{a276a55d520843bf93bca4e6ea7290ff,

title = "High power efficiency tandem organic light-emitting diodes based on bulk heterojunction organic bipolar charge generation layer",

abstract = "The significant enhancement in power efficiency of tandem organic light-emitting diodes (OLEDs) was achieved using bulk heterojunction organic bipolar charge generation layer (CGL), consisted of zinc phthalocyanine (ZnPc): fullerene (C60) blend. In addition to a significant enhancement in luminance and current efficiency this work yielded a maximum power efficiency of 21 lm W-1 for a tandem OLED, notably almost two times higher than that of a single-unit device, with a maximum power efficiency of 10.1 lm W -1. The enhancement in power efficiency at higher luminance is also over 50%. The remarkable enhancement in power efficiency has been attributed to the effective charge generation, transport and extraction due to the presence of interface-modified ZnPc: C60 CGL in tandem OLEDs. Our results demonstrate that the bulk heterojunction, consisting of two matched n- and p-type organic semiconductors, is a promising bipolar CGL for high power efficiency tandem OLEDs.",

author = "Yonghua Chen and Jiangshan Chen and Dongge Ma and Donghang Yan and Lixiang Wang and Furong Zhu",

note = "Funding Information: D. G. Ma acknowledges support by the Science Fund for Creative Research Groups of NSFC (Grant No. 20921061), the National Natural Science Foundation of China (Grant Nos. 50973104), Ministry of Science and Technology of China (973 Program, Grant Nos. 2009CB623604 and 2009CB930603), for the support of this research. F. R. Zhu acknowledges support by the Strategic Development Fund of Hong Kong Baptist University under Grant No. SDF10-0118-P01.",

year = "2011",

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day = "13",

doi = "10.1063/1.3599557",

language = "English",

volume = "98",

journal = "Applied Physics Letters",

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publisher = "American Institute of Physics",

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T1 - High power efficiency tandem organic light-emitting diodes based on bulk heterojunction organic bipolar charge generation layer

AU - Chen, Yonghua

AU - Chen, Jiangshan

AU - Ma, Dongge

AU - Yan, Donghang

AU - Wang, Lixiang

AU - Zhu, Furong

N1 - Funding Information: D. G. Ma acknowledges support by the Science Fund for Creative Research Groups of NSFC (Grant No. 20921061), the National Natural Science Foundation of China (Grant Nos. 50973104), Ministry of Science and Technology of China (973 Program, Grant Nos. 2009CB623604 and 2009CB930603), for the support of this research. F. R. Zhu acknowledges support by the Strategic Development Fund of Hong Kong Baptist University under Grant No. SDF10-0118-P01.

PY - 2011/6/13

Y1 - 2011/6/13

N2 - The significant enhancement in power efficiency of tandem organic light-emitting diodes (OLEDs) was achieved using bulk heterojunction organic bipolar charge generation layer (CGL), consisted of zinc phthalocyanine (ZnPc): fullerene (C60) blend. In addition to a significant enhancement in luminance and current efficiency this work yielded a maximum power efficiency of 21 lm W-1 for a tandem OLED, notably almost two times higher than that of a single-unit device, with a maximum power efficiency of 10.1 lm W -1. The enhancement in power efficiency at higher luminance is also over 50%. The remarkable enhancement in power efficiency has been attributed to the effective charge generation, transport and extraction due to the presence of interface-modified ZnPc: C60 CGL in tandem OLEDs. Our results demonstrate that the bulk heterojunction, consisting of two matched n- and p-type organic semiconductors, is a promising bipolar CGL for high power efficiency tandem OLEDs.

AB - The significant enhancement in power efficiency of tandem organic light-emitting diodes (OLEDs) was achieved using bulk heterojunction organic bipolar charge generation layer (CGL), consisted of zinc phthalocyanine (ZnPc): fullerene (C60) blend. In addition to a significant enhancement in luminance and current efficiency this work yielded a maximum power efficiency of 21 lm W-1 for a tandem OLED, notably almost two times higher than that of a single-unit device, with a maximum power efficiency of 10.1 lm W -1. The enhancement in power efficiency at higher luminance is also over 50%. The remarkable enhancement in power efficiency has been attributed to the effective charge generation, transport and extraction due to the presence of interface-modified ZnPc: C60 CGL in tandem OLEDs. Our results demonstrate that the bulk heterojunction, consisting of two matched n- and p-type organic semiconductors, is a promising bipolar CGL for high power efficiency tandem OLEDs.

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JO - Applied Physics Letters

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High power efficiency tandem organic light-emitting diodes based on bulk heterojunction organic bipolar charge generation layer

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