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Kim, Jin Young
Next Generation Energy Laboratory
Research Interests
  • Polymer solar cells, QD solar cells, organic-inorganic hybrid solar cells, perovskite solar cells, OLEDs, PeLEDs, organic FETs


Efficient Conventional- and Inverted-Type Photovoltaic Cells Using a Planar Alternating Polythiophene Copolymer

DC Field Value Language Lee, Wonho ko Choi, Hyosung ko Hwang, Sungu ko Kim, Jin Young ko Woo, Han Young ko 2014-04-10T02:15:11Z - 2013-06-14 ko 2012-02 -
dc.identifier.citation CHEMISTRY-A EUROPEAN JOURNAL, v.18, no.9, pp.2551 - 2558 ko
dc.identifier.issn 0947-6539 ko
dc.identifier.uri -
dc.identifier.uri ko
dc.description.abstract A low-band-gap alternating copolymer, poly{5,6-bis(octyloxy)-4-(thiophen-2-yl)benzo[c]-1,2,5-thiadiazole} (PTBT), was synthesized and investigated for photovoltaic applications. PTBT showed a minimized torsion angle in its main backbone owing to the introduction of solubilizing octyloxy groups on the electron-poor benzothiadiazole unit, thereby resulting in pronounced intermolecular ordering and a deep level of the HOMO (-5.41 eV). By blending PTBT with [6,6]phenyl-C61-butyric acid methyl ester (PC61BM), highly promising performance was achieved with power-conversion efficiencies (PCEs) of 5.9 and 5.3?% for the conventional and inverted devices, respectively, under air mass 1.5 global (AM 1.5G, 100 mW?cm-2) illumination. The open-circuit voltage (VOC0.850.87 V) is one of the highest values reported thus far for thiophene-based polymers (e.g., poly(3-hexylthiophene) VOC0.6 V). The inverted device also achieved a remarkable PCE compared to other devices based on low-band-gap polymers. Ideal film morphology with bicontinuous percolation pathways was expected from the atomic force microscopy (AFM) images, space-charge-limited current (SCLC) mobility, and selected-area electron-diffraction (SAED) measurements. This molecular design strategy is useful for achieving simple, processable, and planar donoracceptor (DA)-type low-band-gap polymers with a deep HOMO for applications in photovoltaic cells. ko
dc.description.statementofresponsibility close -
dc.language ENG ko
dc.publisher WILEY-V C H VERLAG GMBH ko
dc.subject Air mass ko
dc.subject Alternating copolymer ko
dc.subject Benzothiadiazoles ko
dc.subject Bicontinuous ko
dc.subject Deep level ko
dc.subject Donor-acceptors ko
dc.subject Film morphology ko
dc.subject Intermolecular ordering ko
dc.subject Inverted devices ko
dc.subject Methyl esters ko
dc.subject Molecular design ko
dc.subject Photovoltaic applications ko
dc.subject Photovoltaic devices ko
dc.subject pi interactions ko
dc.subject Poly (3-hexylthiophene) ko
dc.subject Polythiophene copolymers ko
dc.subject Power conversion efficiencies ko
dc.subject Processable ko
dc.subject Space-charge-limited current ko
dc.subject Torsion angle ko
dc.title Efficient Conventional- and Inverted-Type Photovoltaic Cells Using a Planar Alternating Polythiophene Copolymer ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-84863156424 ko
dc.identifier.wosid 000300691000015 ko
dc.type.rims ART ko
dc.description.scopustc 19 * 2014-07-12 *
dc.identifier.doi 10.1002/chem.201102883 ko
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