Charge transport studies in donor-acceptor block copolymer PDPP-TNT and PC71BM based inverted organic photovoltaic devices processed in room conditions
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Sonar, Prashant
Singh, Samarendra P
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Diketopyrrolopyrole-naphthalene polymer (PDPP-TNT), a donor-acceptor co-polymer, has shown versatile behavior demonstrating high performances in organic field-effect transistors (OFETs) and organic photovoltaic (OPV) devices. In this paper we report investigation of charge carrier dynamics in PDPP-TNT, and [6,6]-phenyl C71 butyric acid methyl ester (PC71BM) bulk-heterojunction based inverted OPV devices using current density-voltage (J-V) characteristics, space charge limited current (SCLC) measurements, capacitance-voltage (C-V) characteristics, and impedance spectroscopy (IS). OPV devices in inverted architecture, ITO/ZnO/PDPP-TNT:PC71BM/MoO3/Ag, are processed and characterized at room conditions. The power conversion efficiency (PCE) of these devices are measured ∼3.8%, with reasonably good fill-factor 54.6%. The analysis of impedance spectra exhibits electron’s mobility ∼2 × 10−3 cm2V−1s−1, and lifetime in the range of 0.03-0.23 ms. SCLC measurements give hole mobility of 1.12 × 10−5 cm2V−1s−1, and electron mobility of 8.7 × 10−4 cm2V−1s−1.
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AIP Advances
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5
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7
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© The Author(s) 2015. For information about this journal please refer to the publisher’s website or contact the author(s). Articles are licensed under the terms of the Creative Commons Attribution 3.0 Unported (CC BY 3.0) license (http://creativecommons.org/licenses/by/3.0/) which permits unrestricted, distribution and reproduction in any medium, providing that the work is properly cited.
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Atomic, molecular and optical physics
Quantum physics
Science & Technology
Physical Sciences
Nanoscience & Nanotechnology
Materials Science, Multidisciplinary
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Srivastava, SB; Sonar, P; Singh, SP, Charge transport studies in donor-acceptor block copolymer PDPP-TNT and PC71BM based inverted organic photovoltaic devices processed in room conditions, AIP ADVANCES, 2015, 5 (7), pp. 077177:1-077177:7