Korea University · Engineering
Min Ju Cho 교수의 연구실은 유기 반도체 소재 및 장치의 핵심 기초 연구를 중심으로, 특히 유기 태양전지, 유기 전계효과 트랜지스터, 유기 발광 다이오드(OLED) 등 유기 에너지 장치의 성능 향상을 목표로 합니다. 다양한 전자 구조를 가진 고분자 및 분자 소재를 설계·합성하여, 전하 이동성 향상, 광흡수 특성 최적화, 광발광 효율 증대 등 응용 가능성을 극대화하는 데 중점을 두고 있습니다. 특히, 용액 공정성과 고순도 결정성 나노소재를 접목한 고성능 유기 전자소자 개발이 핵심 연구 방향입니다.
Figures are computed from collected data and may differ slightly.
Abstract Three new color‐tunable (deep‐blue to sky‐blue) and solution‐processable emitters—9′‐(2,12‐di‐ tert ‐butyl‐5,9‐dioxa‐13 b ‐boranaphtho[3,2,1‐ de ]anthracen‐7‐yl)‐9′ H ‐9,3′:6′,9″‐tercarbazole ( TB‐3Cz) , 9′‐(2,12‐di‐ tert ‐butyl‐5,9‐dioxa‐13 b ‐boranaphtho[3,2,1‐ de ]anthracen‐7‐yl)‐9,9″‐diphenyl‐9 H ,9′ H ,9″ H ‐3,3′:6′,3″‐tercarbazole ( TB‐P3Cz) , and 9‐(2,12‐di‐ tert ‐butyl‐5,9‐dioxa‐13 b ‐boranaphtho[3,2,1‐ de ]anthracen‐7‐yl)‐ N 3 , N 3 , N 6 , N 6 ‐tetraphenyl‐9 H ‐carbazole‐3,6‐d
Template-guided solution-shearing (TGSS) is used to fabricate field-effect transistors (FETs) composed of micropatterned prisms as active channels. The prisms comprise highly crystalline PTDPP-DTTE, in which diketopyrrolopyrrole (DPP) is flanked by thiophene. The FET has a maximum mobility of approximately 7.43 cm(2) V(-1) s(-1) , which is much higher than the mobility values of the thin-film transistors with solution-sheared or spin-coated films of PTDPP-DTTE annealed at 200 °C.
We synthesized a novel fully conjugated block copolymer, P3, in which a wide-band gap donor block (P1) was connected to a narrow-band gap acceptor block (P2). As P3 contains P1 block with a wide bandgap and P2 block with a narrow bandgap, it exhibits a very wide complementary absorption. Transient photoluminescence measurement using P3 dilute solution demonstrated intramolecular charge transfer between the P1 block and the P2 block, which was not observed in a P1/P2 blend solution. A P3 thin fil
In this work, three-armed luminogens IAcTr-out and IAcTr-in were synthesized and used as emitters bearing triazine and indenoacridine moieties in thermally activated delayed fluorescence organic light-emitting diodes (OLEDs). These molecules could form a uniform thin film via the solution process and also allowed the subsequent deposition of an electron transporting layer either by vacuum deposition or by an all-solution coating method. Intriguingly, the new luminogens displayed aggregation-indu
Recently, all-polymer solar cells (all-PSCs) have made significant progress in terms of efficiency and performance. Using Y-series-based small-molecule acceptors, a new range of polymer acceptors for all-PSC has been developed. These synthesized polymer acceptors have a low band gap, broad absorption, and easily tunable energy levels, making them suitable n-type candidates for efficient all-PSCs. In this review, we summarize some molecular design and synthesis strategies used to advance the fiel
The first demonstration of polymer nanowire (PNW) crystals based on a diketopyrrolopyrrole-based copolymer (i.e., PDTTDPP), and their application to field-effect transistors (FETs) is reported. Remarkably, transmission electron microscopy and selected area electron diffraction analyses of the PNW reveal its single-crystalline (SC) nature. FETs fabricated of a SC PNW exhibit a maximal charge carrier mobility of ≈7.00 cm(2) V(-1) s(-1) , which is almost one order of magnitude higher than that of t
New M- and V-shaped perylene diimide (PDI)-based small molecules were synthesized as new n-type acceptors for nonfullerene-based polymer solar cells.
In this study, we demonstrated two deep-blue TADF emitters, BO-tCzPhICz and BO-tCzDICz, for solution-processable thermally activated delayed fluorescence organic light-emitting diodes (TADF-OLEDs). They were synthesized by employing an organoboron acceptor and 9-(3,6-di-<i>tert</i>-butyl-9<i>H</i>-carbazol-9-yl)-5-phenyl-5,12-dihydroindolo[3,2-<i>a</i>]carbazole (tCzPhICz) and 12-(3,6-di-<i>tert</i>-butyl-9<i>H</i>-carbazol-9-yl)-15<i>H</i>-diindolo[2,3-<i>b</i>:1',2',3'-<i>lm</i>]carbazole (tCz
New host molecules such as 9-(6-(9H-carbazol-9-yl)pyridin-3-yl)-6-(9H-carbazol-9-yl)-9H-pyrido[2,3-b]indole (pPCB2CZ) and 9-(6-(9H-carbazol-9-yl)pyridin-2-yl)-6-(9H-carbazol-9-yl)-9H-pyrido[2,3-b]indole (mPCB2CZ) were designed and synthesized for blue phosphorescent organic light-emitting diodes (PhOLEDs). The glass transition temperatures of two host molecules were measured higher than 120 °C, and the identical triplet energies were determined to be 2.92 eV for both molecules. The bis(3,5-diflu
We synthesized two types of novel poly(3-alkylthiophene)-free (D)<sub>n</sub>-<italic>b</italic>-(A)<sub>m</sub> conjugated block copolymers: PTQI-<italic>block</italic>-PNDISs.
A new side-chain polymer (X-TPACz) bearing hole-transporting pendant groups accompanying a thermally crosslinkable entity was synthesized using N-([1,1'-biphenyl]-4-yl)- N-(4-(9-(4-vinylbenzyl)-9 H-carbazol-3-yl)phenyl)bicyclo[4.2.0]octa-1(6),2,4-trien-3-amine (6) via addition polymerization. The X-TPACz could be spontaneously crosslinked without using any further reagents and showed a good film-forming property upon low-temperature thermal treatment. The thermal curing temperature for the X-TPA
A light-emitting molecular triad (BPCP-2CPC) with dual functionality was successfully synthesized and applied to solution-processed non-doped organic light-emitting diodes. The BPCP-2CPC triad contains 9-phenyl-9H-carbazole units as a host moiety tethered to a green-emitting core (BPCP) through a cyclohexane unit and exhibits thermally activated delayed fluorescence (TADF) and aggregation-induced emission (AIE) characteristics simultaneously. The BPCP-2CPC-based non-doped TADF-OLED devices showe
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