Elucidating the photoluminescence-enhancement mechanism in a push-pull conjugated polymer induced by hot-electron injection from gold nanoparticles

查看全文 作　　者：DONGKI [1]LEE;SE GYO [2]HAN;JUNGHO [2]MUN;KIHYUK [1]YANG;SUNG HYUK [1]KIM;JUNSUK [2,3]RHO;KILWON [2]CHO;DONGYEOP [4]X.OH;MUN SEOK [1]JEONG 机构地区：[1]Department of Energy Science,Sungkyunkwan University,Suwon 16419,Republic of Korea;[2]Department of Chemical Engineering,Pohang University of Science and Technology,Pohang 37673,Republic of Korea;[3]Department of Mechanical Engineering,Pohang University of Science and Technology,Pohang 37673,Republic of Korea;[4]Research Center for Bio-based Chemistry,Korea Research Institute of Chemical Technology(KRICT),Ulsan 44429,Republic of Korea 出　　处：《Photonics Research》索引2021年第9卷第2期,共11页 基　　金：National Research Foundation of Korea(NRF-2020R1I1A1A01054660);KRICT core project(SS2042);Ministry of Science and ICT,South Korea(NRF-2019M3D1A1078304,NRF-2019R1A2B5B02070657)。 摘　　要：Understanding the photophysical interactions between the components in organic-inorganic nanocomposites is a key factor for their efficient application in optoelectronic devices. In particular, the photophysical study of nanocomposites based on organic conjugated polymers is rare. We investigated the effect of surface plasmon resonance(SPR) of gold nanoparticles(Au NPs) on the photoluminescence(PL) property of a push-pull conjugated polymer(PBDB-T). We prepared the hybrid system by incorporating poly(3-hexylthiophene)-stabilized Au NPs(P3 HT-Au NPs) into PBDB-T. The enhanced and blueshifted PL was observed in the hybrid system compared to PL in a neat PBDB-T system, indicating that the P3 HT chains attached to the Au NPs suppressed charge-transfer from PBDB-T to the Au NPs and relayed the hot electrons to PBDB-T(the band-filling effect).This photophysical phenomenon limited the auto-dissociation of PBDB-T excitons. Thus, the radiative recombination of the excitons occurred more in our hybrid system than in the neat system. 关 键 词：CONJUGATED system POLYMER