Small molecular organic photovoltaic cells with exciton blocking layer at anode interface for improved device performance

Masaya Hirade, Chihaya Adachi

Research output: Contribution to journalArticlepeer-review

81 Citations (Scopus)

Abstract

We demonstrate enhanced power conversion efficiency (PCE) for small molecular-based organic photovoltaic cells with an exciton blocking layer (ExBL) at the anode/donor interface. Although poly(3,4-ethylenedioxythiophene): poly(4-styrene sulfonate) (PEDOT:PSS) films are widely used as anodic buffer layers, they also act as exciton quenchers. To prevent exciton quenching, we introduced a tris[4-(5-phenyl thiophen-2-yl)phenyl]amine layer between the donor and the PEDOT:PSS layer and clarified its effect. By a combination of dual ExBLs at both the anode and cathode sides, we achieved significantly enhanced short circuit current and PCE values; the highest PCE 5.24 was obtained by optimizing the device parameters.

Original languageEnglish
Article number153302
JournalApplied Physics Letters
Volume99
Issue number15
DOIs
Publication statusPublished - Oct 10 2011

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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