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Research Papers

Research Progress on Improving the Photovoltaic Performance of Polymer Solar Cells

[+] Author and Article Information
Yanmin Wang

College of Materials Science and Engineering,  Shandong University of Science and Technology, 579 Qianwangang Road, Qingdao Economic & Technical Development Zone, Qingdao 266510, Shandong Province, P. R. Chinaholylilyee@163.com

J. Sol. Energy Eng 134(1), 011017 (Dec 01, 2011) (9 pages) doi:10.1115/1.4005248 History: Received March 17, 2011; Revised September 06, 2011; Published December 01, 2011; Online December 01, 2011

Although polymer materials possess the advantages such as low cost and easy fabrication of flexible and large-scale film for the application in photovoltaic devices, the performance of polymer-based solar cells, especially energy conversion efficiency is inferior to their inorganic counterpart due to the shorter charge diffusion length caused by the comparatively lower electric field between the electrodes. This paper reviewed the strategies to improve their photovoltaic properties mainly concentrated on modifying the polymer materials and ameliorating the device configuration. First, polythiophene (PT), poly(phenylene vinylene) (PPV), polyfullerene, and other novel polymer materials were introduced and the effective ways to modify their derivatives with more advantages were described in detail, for instance, copolymerization, incorporating additives and dyes, etc. Furthermore, the content of ameliorating the device configuration encompassed on inverted architecture, tandem structure, the introduction of buffer layers, thermal annealing, and the integration of optimized conditions. Finally, the effects of the improvement methods were concisely summarized, and the perspectives of the future research were put forth.

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Copyright © 2012 by American Society of Mechanical Engineers
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Figures

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Figure 1

Molecular structures of PT derivatives (P1–P5)

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Figure 2

Molecular structure of poly(thienyl-silole)

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Figure 3

The energy band diagram of the materials including MWCN, n-Si and P3OT in the solar cell

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Figure 4

Molecular structure of poly[(2-methoxy-5,2′-ethyhexyloxy)-1,4phenylenevinylene] (MEH-PPV)

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Figure 5

Molecular structure of LBPF3

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Figure 6

Molecular structures of APFO-3 and APFO-4

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Figure 7

Molecular structure of PDTSTPD

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Figure 8

Molecular structures of PBDTTPT1 and PBDTTPT2

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Figure 9

Schematic representation of device architectures for (a) sol–gel bilayer, (b) nanoparticle bilayer, (c) conventional blend, and (d) inverted blend devices

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Figure 10

J-V characteristics of different anodes/P3HT:PCBM (100 nm)/Al(100 nm) photovoltaic cells under AM1.5 illumination [82]

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Figure 11

The effects of annealing temperature on Jsc and efficiency of solar cells with the configuration of Ag/PV/PF8-TPD-T2/PEDOT:PSS/ITO [91]

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