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Yang, Changduk
Advanced Tech-Optoelectronic Materials Synthesis Lab (ATOMS)
Research Interests
  • Optoelectronic materials synthesis/organic electronics, functionalization of carbonaceous solids, advanced materials chemistry, macromolecular chemistry

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A Selenophene Analogue of PCDTBT: Selective Fine-Tuning of LUMO to Lower of the Bandgap for Efficient Polymer Solar Cells

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dc.contributor.author Kim, Boram ko
dc.contributor.author Yeom, Hye Rim ko
dc.contributor.author Yun, Myoung Hee ko
dc.contributor.author Kim, Jin Young ko
dc.contributor.author Yang, Changduk ko
dc.date.available 2014-04-10T01:12:59Z -
dc.date.created 2013-06-07 ko
dc.date.issued 2012-11 -
dc.identifier.citation MACROMOLECULES, v.45, no.21, pp.8658 - 8664 ko
dc.identifier.issn 0024-9297 ko
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/2864 -
dc.identifier.uri http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84869064681 ko
dc.description.abstract In an attempt to further improve the performance of the PCDTBT-based polymer Solar cells (PSCs), we have synthesized a selenophene. analogue of PCDTBT, namely, PCDSeBT, in which diselenienylbenzothiadiazole (DSeBT) monomer alternately flanks with a 2,7-carbazole unit. The intrinsic properties of PCDSeBT are not only characterized by UV-vis absorption, cyclic voltammetry (CV), and organic field-effect transistors (OFETs) but also the surface morphology, mobilities of space charge-limited current (SCLC) model, and polymer solar cells (PSCs) in its bulk-heterojunction (BHJ) active layer with [6,6]-phenyl C-71-butyric acid methyl ester (PC71BM) are evaluated in detail. It is found that PCDSeBT simultaneously has a low-lying highest occupied molecular orbital (HOMO) energy level at -5.4 eV and a low bandgap of 130 eV as required by the ideal polymers for BHJ PSCs. The high current of 11.7 mA/cm(2) is obtained for PCDSeBT-based PSCs, to our knowledge, which is among, the highest short-circuit current density (J(SC)) values obtained from a BIT device consisting of PCDTBT derivatives and [6,6] phenyl C-61-butyric acid methyl ester (PCBM). The high J(SC) value, along with moderate fill factor (FP) of 45% and a high open circuit voltage (V-OC) of 079 V, yields a power conversion efficiency (PCE) of 4:12%, which is about 37% increase in PCE from a PCDTBT-based reference device. On the basis of our results, one can be concluded that the DSeBT placement for construction of donor (D) acceptor (A) polymers is an easy and effective way to realize both the higher J(SC) and V-OC values in PSCs, as a consequence of the selective lower-lying lowest unoccupied molecular orbital (LUMO) with the HOMO being almost unchanged, together with the effective broadening on the absorption band. ko
dc.description.statementofresponsibility close -
dc.language ENG ko
dc.publisher AMER CHEMICAL SOC ko
dc.subject 2 ,7-carbazole ko
dc.subject Active Layer ko
dc.subject Bulk heterojunction ko
dc.subject Fill factor ko
dc.subject High currents ko
dc.subject Highest occupied molecular orbital energy levels ko
dc.subject Intrinsic property ko
dc.subject Low bandgap ko
dc.subject Lowest unoccupied molecular orbital ko
dc.subject Methyl esters ko
dc.subject Polymer Solar Cells ko
dc.subject Power conversion efficiencies ko
dc.subject Reference devices ko
dc.subject Selenophene ko
dc.subject UV-vis absorptions ko
dc.title A Selenophene Analogue of PCDTBT: Selective Fine-Tuning of LUMO to Lower of the Bandgap for Efficient Polymer Solar Cells ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-84869064681 ko
dc.identifier.wosid 000311245200017 ko
dc.type.rims ART ko
dc.description.wostc 42 *
dc.description.scopustc 28 *
dc.date.tcdate 2015-02-28 *
dc.date.scptcdate 2014-08-22 *
dc.identifier.doi 10.1021/ma302133h ko
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