Organic Photovoltaic Cells Based on PbPc Nanocolumns Prepared by Glancing Angle Deposition

Yang Liu,Jian Wang,Fujun Zhang

doi:10.1155/2013/346818

Yang Liu, Jian Wang + Show 1 more

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https://doi.org/10.1155/2013/346818

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Abstract

Organic small material lead phthalocyanine (PbPc) nanocolumns were prepared via glancing angle deposition (GLAD) on indium tin oxide (ITO) coated glass substrates. Organic electron acceptor materials fullerene (C60) was evaporated onto the nanocolumn PbPc thin films to prepare heterojunction structure ITO/PbPc/C60/Bphen/Al organic photovoltaic cells (OPVs). It is worthwhile to mention that C60molecules firstly fill the voids between PbPc nanocolumns and then form impact C60layer. The interpenetrating electron donor/acceptor structure effectively enhances interface between electron donor and electron acceptor, which is beneficial to exciton dissociation. The short circuit current density (Jsc) of organic photovoltaic devices (OPVs) based on PbPc nanocolumn was increased from 1.19 mA/cm2to 1.74 mA/cm2, which should be attributed to the increase of interface between donor and acceptor. The effect of illumination intensity on the performance of OPVs was investigated by controlling the distance between light source and sample, and theJscof two kind of OPVs was increased along with the increase of illumination intensity.

Highlights

Organic photovoltaic devices (OPVs) are potential candidates for light weight, low-cost solar energy conversion, and ease of processing [1,2,3,4]
Tang firstly reported planar heterojunction (PHJ) devices based on CuPc/C60 as the active layer, which was considered as a milestone of OPVs development [7]
The OPVs with PbPc films prepared by glancing angle deposition (GLAD) show better performance compared with the OPVs based on PbPc films prepared under normal conditions

Summary

Introduction

Organic photovoltaic devices (OPVs) are potential candidates for light weight, low-cost solar energy conversion, and ease of processing [1,2,3,4]. Van Dijken et al applied the GLAD technology to fabricate donor layer and spincoated acceptor solution onto the nanostructure donor layer for achieving a mixed heterojunction OPVs, which shows a better performance than the common bilayer heterojunction OPV [14,15,16]. This approach has been used to fabricate nanocolumn structural thin films for indium tin oxide (ITO) electrodes [17] and electron acceptor material C60 [18, 19], providing large interfacial area for exciton extraction and charge carrier collection.

C60 Bphe n

Experimental Details

Results and Discussions

Conclusion