Title :
New buffer interlayer for improving device performances of organic small molecule solar cells
Author :
Kang, Bonan ; Gao, Qiang ; Shi, Jinglong
Author_Institution :
State Key Lab. on Integrated Optoelectron., Jilin Univ., Changchun, China
Abstract :
We investigate the effects of polytetrafluoroethylene (PTFE) on organic photovoltaic (OPV) devices with structure of ITO/PTFE/ poly(3, 4-ethylenedioxythiophene):poly(styrene-sulfonate) (PEDOT:PSS)/copper phthalocyanine(CuPc)/C60/bathocuproine(BCP)/Al by inserting thermally evaporated PTFE films between indium-tin-oxide (ITO) and PEDOT:PSS layers. Significant improvement in terms of open-circuit voltage, short-circuit current, and thereby in its commensurate power conversion efficiency is achieved compared to devices with PEDOT:PSS layers. The OPVs performance enhancement is attributed to the formation of an artificial dipole layer resulting from the rich, negatively charged fluorine that facilitates the hole extraction process.
Keywords :
organic semiconductors; photovoltaic cells; solar cells; ITO/PTFE/ poly(3, 4-ethylenedioxythiophene):poly(styrene-sulfonate) (PEDOT:PSS)/copper phthalocyanine(CuPc)/C60/bathocuproine(BCP)/Al; artificial dipole layer; buffer interlayer; device performance; hole extraction process; open circuit voltage; organic photovoltaic device; organic small molecule solar cells; polytetrafluoroethylene; short circuit current; thermally evaporated PTFE film; Buffer layers; Indium tin oxide; Performance evaluation; Photovoltaic cells; Polymers; Buffer Interlayer; Organic Small molecule; Solar Cells; polytetrafluoroethylene (PTFE);
Conference_Titel :
Electronics, Communications and Control (ICECC), 2011 International Conference on
Conference_Location :
Ningbo
Print_ISBN :
978-1-4577-0320-1
DOI :
10.1109/ICECC.2011.6066506