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Your search keyword '"Yan, Qing"' showing total 6 results
Start Over Author "Yan, Qing" Topic indium tin oxide Journal applied physics letters
6 results on '"Yan, Qing"'

1. Highly efficient inverted organic solar cells using amino acid modified indium tin oxide as cathode

Author

Riming Nie, Yan-Qing Li, Shizhao Zheng, King-Young Wong, Xianyu Deng, Aiyuan Li, Huai-Xin Wei, and Jian-Xin Tang

Subjects
Physics and Astronomy (miscellaneous), Organic solar cell, Open-circuit voltage, Inorganic chemistry, chemistry.chemical_element, digestive system, Electron spectroscopy, Cathode, law.invention, Indium tin oxide, chemistry, X-ray photoelectron spectroscopy, law, Work function, Indium
Abstract

In this paper, we report that highly efficient inverted organic solar cells were achieved by modifying the surface of indium tin oxide (ITO) using an amino acid, Serine (Ser). With the modification of the ITO surface, device efficiency was significantly enhanced from 0.63% to 4.17%, accompanied with an open circuit voltage (Voc) that was enhanced from 0.30 V to 0.55 V. Ultraviolet and X-ray photoelectron spectroscopy studies indicate that the work function reduction induced by the amino acid modification resulting in the decreased barrier height at the ITO/organic interface played a crucial role in the enhanced performances.

Published
2014

2. Efficient inverted polymer solar cells with thermal-evaporated and solution-processed small molecular electron extraction layer

Author

Huai-Xin Wei, Zai-Quan Xu, Yan-Qing Li, Shuit-Tong Lee, Ai-Li Shi, Fu-Zhou Sun, and Jian-Xin Tang

Subjects
chemistry.chemical_classification, Materials science, Physics and Astronomy (miscellaneous), business.industry, Extraction (chemistry), Polymer, Evaporation (deposition), Cathode, Polymer solar cell, Active layer, law.invention, Indium tin oxide, chemistry, law, Optoelectronics, business, Layer (electronics)
Abstract

Efficient inverted polymer solar cell is reported upon by integrating with a small molecular 1,3,5-tri(phenyl-2-benzimi-dazolyl)-benzene (TPBi) electron extraction layer (EEL) at low processing temperature with thermal-evaporation and solution-process, resulting in the power conversion efficiencies of 3.70% and 3.47%, respectively. The potential of TPBi as an efficient EEL is associated with its suitable electronic energy level for electron extraction and hole blocking from the active layer to the indium tin oxide cathode.

Published
2013

3. Enhanced performance in polymer photovoltaic cells with chloroform treated indium tin oxide anode modification

Author

Shuit-Tong Lee, Pan-Pan Cheng, Jilong Tang, Jinpeng Yang, J. Q. Li, Yan-Qing Li, Zai-Quan Xu, and Jing Zhao

Subjects
Photocurrent, Conductive polymer, Materials science, Physics and Astronomy (miscellaneous), Inorganic chemistry, Energy conversion efficiency, Work function, Substrate (electronics), Polymer solar cell, Indium tin oxide, Anode
Abstract

Enhanced performance of a poly(3-hexylthiophene):(6,6)-phenyl C61 butyric acid methyl ester bulk heterojunction polymer photovoltaic cell is reported by modifying the indium tin oxide (ITO) anode with chloroform solution. Instead of the traditional UV-ozone treatment, the optimized chloroform modification on ITO anode can result in an enhancement in the power conversion efficiency of an identical device, originating from an increase in the photocurrent with negligible change in the open-circuit voltage. The performance enhancement is attributed to the work function modification of the ITO substrate through the surface incorporation of the chlorine, and thus improved charge collection efficiency.

Published
2011

4. Anode modification of polymer light-emitting diode using graphene oxide interfacial layer: The role of ultraviolet-ozone treatment.

Author

Jiang, Xiao-Chen, Li, Yan-Qing, Deng, Yan-Hong, Zhuo, Qi-Qi, Lee, Shuit-Tong, and Tang, Jian-Xin

Subjects
*POLYMER light emitting diodes, *GRAPHENE oxide, *PHOTOELECTRON spectroscopy, *IMPEDANCE spectroscopy, *INDIUM tin oxide
Abstract

A simple and efficient method has been developed to modify the anode interface of polymer light-emitting diode by incorporating solution-processable graphene oxide as hole transport layer. Interface engineering of ultraviolet-ozone treatment on graphene oxide is demonstrated to dramatically enhance the electrical properties, leading to 15% increase in efficiency compared to that with a traditionally used poly(styrenesulfonate)-doped poly(3,4-ethylenedioxythiophene) layer. As determined by photoelectron spectroscopy and impedance spectroscopy, an optimized ultraviolet-ozone treatment results in a more favorable energy level alignment and a decrease in series resistance, which can subsequently facilitate charge injection at the anodic interface. [ABSTRACT FROM AUTHOR]

Published
2013
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5. Performance enhancement of polymer solar cells with luminescent down-shifting sensitizer.

Author

Ma, Guo-Fu, Xie, Hao-Jun, Cheng, Pan-Pan, Li, Yan-Qing, and Tang, Jian-Xin

Subjects
SOLAR cells, PHOTOSENSITIZERS, TRIS(8-hydroxyquinoline) aluminum, FABRICATION (Manufacturing), METHYL formate, PHOTOCURRENTS, INDIUM tin oxide
Abstract

Enhanced performance of polymer solar cells is reported by incorporating a solution-processed luminescent down-shifting (LDS) sensitizer, which is composed of a C545T fluorescent molecule doped tris(8-quinolinolato) aluminum (C545T:Alq3). An optimized LDS sensitizer can result in ∼15% enhancement in power conversion efficiency than the reference device with pristine Alq3. The performance enhancement is associated with the increase in photocurrent induced by LDS sensitizer, which is capable of absorbing short-wavelength solar spectrum and re-emitting long-wavelength light, which is complementary with the absorption spectrum of the active layer. This method provides a facile approach for high-performance polymer solar cell designs. [ABSTRACT FROM AUTHOR]

Published
2013
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6. Efficient inverted polymer solar cells with thermal-evaporated and solution-processed small molecular electron extraction layer.

Author

Sun, Fu-Zhou, Shi, Ai-Li, Xu, Zai-Quan, Wei, Huai-Xin, Li, Yan-Qing, Lee, Shuit-Tong, and Tang, Jian-Xin

Subjects
SOLAR cells, MOLECULAR electronics, ELECTRONS, INDIUM tin oxide, SUBSTRATES (Materials science)
Abstract

Efficient inverted polymer solar cell is reported upon by integrating with a small molecular 1,3,5-tri(phenyl-2-benzimi-dazolyl)-benzene (TPBi) electron extraction layer (EEL) at low processing temperature with thermal-evaporation and solution-process, resulting in the power conversion efficiencies of 3.70% and 3.47%, respectively. The potential of TPBi as an efficient EEL is associated with its suitable electronic energy level for electron extraction and hole blocking from the active layer to the indium tin oxide cathode. [ABSTRACT FROM AUTHOR]

Published
2013
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