Polaron Pair-Mediated Radiative Recombination of Singlet Excitons in a Conjugated Polymer Aggregate by Plasmonic and Semiconductor Nanocrystals

被引：0

作者：

Kim, Yeon Gyu ^{[1
]}

Han, Se Gyo ^{[2
]}

Shao, Guanning ^{[1
]}

Ha, Taeyong ^{[3
,4
]}

Sung, Yunmo ^{[3
,4
]}

Jeong, Minyoung ^{[2
]}

Yun, Hyuk Gu ^{[2
]}

Ryu, Jeong Yeon ^{[1
]}

Kim, Dong Hyeon ^{[5
]}

Kim, Bora ^{[5
]}

Jeong, Mun Seok ^{[5
]}

Kim, Sungjee ^{[3
,4
]}

Choi, Young Jin ^{[1
,6
]}

Hong, Young Joon ^{[7
,8
]}

Cho, Kilwon ^{[2
]}

Lee, Dongki ^{[1
]}

机构：

[1] Sejong Univ, Dept Nanotechnol & Adv Mat Engn, Seoul 05006, South Korea

[2] Pohang Univ Sci & Technol, Dept Chem Engn, Pohang 37673, South Korea

[3] Pohang Univ Sci & Technol, Dept Chem, Pohang 37673, South Korea

[4] Pohang Univ Sci & Technol, Dept Sch Interdisciplinary Biosci & Bioengn, Pohang 37673, South Korea

[5] Hanyang Univ HYU, Dept Phys, Seoul 04763, South Korea

[6] Sejong Univ, Hybrid Mat Res Ctr HMC, Seoul 05006, South Korea

[7] Sungkyunkwan Univ, SKKU Adv Inst Nanotechnol, Dept Nano Engn, Suwon 16419, Suwon, South Korea

[8] Sungkyunkwan Univ, SKKU Adv Inst Nanotechnol, Dept Nano Sci & Technol, Suwon 16419, South Korea

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2024年 / 15卷 / 47期

基金：

新加坡国家研究基金会;

关键词：

HOT-ELECTRON INJECTION; ENERGY-TRANSFER; DELOCALIZATION; INTRACHAIN; DYNAMICS; GENERATION; CONVERSION; DIFFUSION; ACCEPTOR; LIGAND;

D O I：

10.1021/acs.jpclett.4c02662

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We investigated the excited-state dynamics of a conjugated polymer (CP:P3HT)-based ternary hybrid system containing P3HT-coated gold nanoparticles and quantum dots. Transient absorption spectroscopy results revealed that polaron pairs (PPs) originating from nonrelaxed singlet (S1) excitons of the CP aggregate in the ternary system have shorter electron-hole separation distances than those of PPs in the neat CP aggregate because of the photophysical effects of plasmonic and semiconductor nanocrystals. In particular, the shorter electron-hole distances of PPs led to more back-recombination to S1 excitons than dissociation into positive polarons in the ternary system, resulting in increased S1 radiative recombination compared with that in the neat CP system. Thus, the photoluminescence intensity of the CP aggregate in the ternary system increased. Our findings provide new insights into the excited-state dynamics of CPs and pave the way for the development of next-generation high-efficiency optoelectronic devices.

引用

页码：11806 / 11814

页数：9