Origin of the Improved Power Conversion Efficiency of Pentacene/C

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概要

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• The authors report the impact of the crystallinity property of the electron donor on the performance of a pentacene/C<inf>60</inf>organic photovoltaic device. After subjecting pentacene to sublimation twice, all the photovoltaic parameters showed significant improvements leading to enhancement of the power conversion efficiency from 0.9 to 2.2% under air mass 1.5G solar illumination. This is attributed to the well-packed molecular structure in the pentacene thin film, as observed by X-ray diffraction, which leads to high carrier mobility and hence high photocurrent. Moreover, the elimination of microscopic pinholes or defect sites due to the improvement in the degree of the pentacene thin film reduces the dark current and therefore increases the photovoltage. The external quantum efficiency and space-charge limited current are used to analyze the relationship between the quality of thin film electron donor and device performance.

• 2013-04-25

著者

• Su Wei-Cheng

  Department of Electronic Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan

• Liu Shun-Wei

  Department of Electronic Engineering, Ming Chi University of Technology, New Taipei City 24301, Taiwan

• Lee Chih-Chien

  Department of Electronic Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan, Republic of China

• Cheng Ching-Wen

  Department of Electronic Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan 10607, Republic of China

• Su Wei-Cheng

  Department of Electronic Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan 10607, Republic of China

• Chou Chia-Chang

  Department of Electronic Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan 10607, Republic of China

• Lin Chun-Feng

  Department of Electronic Engineering, Ming Chi University of Technology, New Taipei City, Taiwan 24301, Republic of China

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• Organic Photovoltaic Cells Employing an Ultrathin Electron Donor of Arylamino-Substituted Fumaronitrile Material
• Numerical Simulation of Electrical Model for Organic Light-Emitting Devices with Fluorescent Dopant in the Emitting Layer
• Origin of the Improved Power Conversion Efficiency of Pentacene/C
• Improving the performance of subphthalocyanine/C

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