An effective bilayer cathode buffer for highly efficient small molecule organic solar cells
Journal
Organic Electronics: physics, materials, applications
Journal Volume
13
Journal Issue
10
Pages
1925-1929
Date Issued
2012
Author(s)
Abstract
Novel organic/ultrathin low work function metal bilayer cathode buffers for small molecule organic solar cells are proposed. Ultrathin low work function metal layers possess a high built-in electric field for effective carrier extraction and a high cathode reflectivity for maximum absorption in the photoactive layers. This leads to a significant increase of short circuit current density and fill factor of cells. By integrating this bilayer cathode buffer with DTDCTB:C60 small molecular heterojunction, the device exhibits a high power conversion efficiency of up to 5.28%, which is an improvement of 22% compared to a device with a traditional single organic layer buffer. © 2012 Elsevier B.V. All rights reserved.
Subjects
Cathode buffer; Electron transporting layer; Organic photovoltaics; Small molecule solar cells
SDGs
Other Subjects
Cathodes; Electric fields; Heterojunction bipolar transistors; Heterojunctions; Molecules; Solar cells; Solar power generation; Work function; Built-in electric fields; Carrier extraction; Electron transporting layer; High power conversion; Organic photovoltaics; Photoactive layers; Small molecules; Small-molecule organic solar cells; Organic solar cells
Type
journal article