Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/5075
Title: Short circuit current improvement in planar heterojunction organic solar cells by multijunction charge transfer
Authors: Wang, JC
Shi, SQ 
Leung, CW 
Lau, SP 
Wong, KY 
Chan, PKL
Issue Date: 30-Jan-2012
Source: Applied physics letters, 30 Jan. 2012, v. 100, no. 5, 053301, p. 1-3
Abstract: A multijunction structure was applied on an organic photovoltaic (OPV) device for broadening the absorption spectrum and enhancing the power conversion efficiency through charge transfer process. By inserting the tris[4-(2-thienyl)]amine (TTPA) into a boron subphthalocyanine chloride (SubPc)/C₆₀ OPV device, the short circuit current density (J[sub sc]) showed a 47.5% increases from 3.05 to 4.50 mA/cm² in the bilayer planar heterojunction device, while the open circuit voltage (V[sub oc]) remained constant. Based on the single junction (TTPA/SubPc) device and photoluminescence absorption results, we confirmed both TTPA/SubPc and SubPc/C₆₀ junctions are contributing to the exciton dissociation process hence the efficiency enhancement.
Keywords: Charge exchange
Current density
Dissociation
Excitons
Fullerenes
Organic compounds
Photoluminescence
Power conversion
Short-circuit currents
Solar cells
Publisher: American Institute of Physics
Journal: Applied physics letters 
ISSN: 0003-6951
EISSN: 1077-3118
DOI: 10.1063/1.3680253
Rights: © 2012 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in J. C. Wang et al., Appl. Phys. Lett. 100, 5 (2012) and may be found at http://link.aip.org/link/?apl/100/053301
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