Understanding the open-circuit voltage of organic photovoltaic devices with donor deposited at different deposition rate

Wei Cheng Su, Chih Chien Lee, Bo Yao Huang, Wen Chang Chang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This report demonstrated that the open-circuit voltage (VOC) of organic photovoltaic devices could be altered by changing the deposition rate of donor. The VOC was higher when used a higher deposition rate of donor. Atomic force microscopic image of donor thin film showing the presence of pinholes indicated the strong molecular interaction at the lower deposition rate. These may cause a severe leakage current from acceptor to anode as observed in the dark current. Equivalent circuit model and temperature-dependent dark currents were utilized to realize the effect of reverse saturation current on VOC. The higher barrier height at the donor-acceptor interface was attributed to the improved VOC for the device with higher donor deposition rate.

Original languageEnglish
Title of host publicationProceedings of AM-FPD 2014 - The 21st International Workshop on Active-Matrix Flatpanel Displays and Devices
Subtitle of host publicationTFT Technologies and FPD Materials
PublisherIEEE Computer Society
Pages213-216
Number of pages4
ISBN (Print)9784863483958
DOIs
Publication statusPublished - Jan 1 2014
Externally publishedYes
Event21st International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, AM-FPD 2014 - Kyoto, Japan
Duration: Jul 2 2014Jul 4 2014

Conference

Conference21st International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, AM-FPD 2014
CountryJapan
CityKyoto
Period7/2/147/4/14

ASJC Scopus subject areas

  • Hardware and Architecture
  • Electrical and Electronic Engineering

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