Small molecular organic photovoltaic cells with exciton blocking layer at anode interface for improved device performance
Authors:
- 10 October 2011
- journal article
- conference paper
- Published by AIP Publishing in Applied Physics Letters
- Vol. 99 (15) , 153302
Abstract
We demonstrate enhanced power conversion efficiency (ηPCE) 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 ηPCE values; the highest ηPCE = 5.24% was obtained by optimizing the device parameters.Keywords
This publication has 11 references indexed in Scilit:
- Sensitization of organic photovoltaic cells based on interlayer excitation energy transferOrganic Electronics, 2010
- Efficient Organic Solar Cells Using a High-Quality Crystalline Thin Film as a Donor LayerAdvanced Materials, 2009
- Columnar Structure in Bulk Heterojunction in Solution-Processable Three-Layered p-i-n Organic Photovoltaic Devices Using Tetrabenzoporphyrin Precursor and Silylmethyl[60]fullereneJournal of the American Chemical Society, 2009
- Organic thin-film solar cell employing a novel electron-donor materialSolar Energy Materials and Solar Cells, 2009
- Open circuit voltage enhancement due to reduced dark current in small molecule photovoltaic cellsApplied Physics Letters, 2009
- High-efficiency hole extraction/electron-blocking layer to replace poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) in bulk-heterojunction polymer solar cellsApplied Physics Letters, 2008
- Organic p-i-n solar cellsApplied Physics A, 2004
- The influence of a PEDOT:PSS layer on the efficiency of a polymer light-emitting diodeOrganic Electronics, 2003
- Small molecular weight organic thin-film photodetectors and solar cellsJournal of Applied Physics, 2003
- Very-high-efficiency double-heterostructure copper phthalocyanine/C60 photovoltaic cellsApplied Physics Letters, 2001