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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


Designing a naphthyridinedione-based conjugated polymer for thickness-tolerant high efficiency polymer solar cells

DC Field Value Language Park, Jun-Mo ko Lee, Tack Ho ko Kim, Dong Won ko Kim, Jae Won ko Chung, Hae Yeon ko Heo, Jungwoo ko Park, Song Yi ko Yoon, Won Sik ko Kim, Jin Young ko Park, Soo Young ko 2021-05-28T00:37:36Z - 2021-05-14 ko 2021-05 ko
dc.identifier.citation JOURNAL OF MATERIALS CHEMISTRY A, v.9, no.17, pp.10846 - 10854 ko
dc.identifier.issn 2050-7488 ko
dc.identifier.uri -
dc.description.abstract Conjugated polymers with a high absorption coefficient and high charge mobility are essential for high power conversion efficiency (PCE) and large area roll-to-roll processing of polymer solar cells. However, only a few conjugated polymers with both properties have been reported so far. Recently, we have reported an innovative naphthyridinedione (NTD)-based highly crystalline polymer (PNTDT-2F2T) with an exceptionally high absorption coefficient (alpha = 1.6 x 10(5) cm(-1)) and charge mobility (mu(h) = 8.6 x 10(-3) cm(2) V-1 s(-1)), which showed 9.6% PCE with a thick active layer (210 nm). However, the PCE decreases considerably to 7.4% with a thin active layer (80 nm) due to a reduction in the photocurrent owing to the still smaller absorption coefficient and rather larger crystalline domain size of PNTDT-2F2T. To develop a thickness-tolerant high efficiency polymer solar cell aiming at low-cost commercial manufacture, we report a newly designed NTD-based conjugated polymer (PNTD4T-2FB) with an increased absorption coefficient and controlled crystallinity that contains 1,4-difluorobenzene units, in this work. The smaller crystal size (crystalline coherence length (CCL) = 2.20 nm) and higher absorption coefficient (alpha = 2.0 x 10(5) cm(-1)) of PNTD4T-2FB compared to those of PNTDT-2F2T (CCL = 3.19 nm) facilitate charge generation while maintaining a high carrier mobility (mu(h) = 2.92 x 10(-3) cm(2) V-1 s(-1)). Consequently, the PNTD4T-2FB based device shows improved PCE (10.1%) with a thicker active layer (330 nm) while keeping a PCE of 9.2% for an active layer of only 70 nm thickness as well. Comparative analysis with PNTD4T-B (which does not contain fluorine) suggests that the superior characteristics of PNTD4T-2FB are attributable to the slightly twisted but rigid backbone arising from the S-F intra-molecular non-bonding interaction between 1,2-difluorobenzene and thiophene. ko
dc.language 영어 ko
dc.publisher ROYAL SOC CHEMISTRY ko
dc.title Designing a naphthyridinedione-based conjugated polymer for thickness-tolerant high efficiency polymer solar cells ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-85105572944 ko
dc.identifier.wosid 000641866600001 ko
dc.type.rims ART ko
dc.identifier.doi 10.1039/d1ta01362a ko
dc.identifier.url!divAbstract ko
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