Effect of the vertical composition gradient of active layer on the performance of bulk-heterojunction organic photovoltaic cell

Young Min Nam, June Huh, Won Ho Jo

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

A computational model is developed to investigate the effect of vertical composition gradient on the photovoltaic properties of organic photovoltaic cell based on poly (3-hexylthiophene) (P3HT) and [6,6]-phenyl C 61-butyric acid methyl ester (PCBM). When the photovoltaic properties of model devices with systematic variation of vertical composition distribution are calculated by using this model, it is found that the efficiency increases almost linearly as the concentrations of P3HT and PCBM become richer near anode and cathode, respectively. The larger exciton generation near anode due to enrichment of P3HT near the anode contributes mainly to an increase of the device efficiency by compensating the lower hole mobility of P3HT with shorter pathway to the anode.

Original languageEnglish
Article number114521
JournalJournal of Applied Physics
Volume110
Issue number11
DOIs
Publication statusPublished - 2011 Dec 1

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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