Enhancement of Energy Transfer Efficiency with Structural Control of Multichromophore Light‐Harvesting Assembly

Advanced Science

Sunhong Jun¹  Woo‐Dong Jang²  Hosoowi Lee²  Jeongho Kim³  Inhwan Oh⁴  Eun Hyuk Choi⁴  Hyotcherl Ihee⁴  Chang Woo Kim⁴  Changwon Kim⁴  Young Min Rhee⁴  Tae Wu Kim⁴ 

[1] Center for Nanomaterials and Chemical Reactions Institute for Basic Science (IBS) Daejeon 34141 Republic of Korea;Department of Chemistry College of Science Yonsei University Seoul 120‐749 Republic of Korea;Department of Chemistry Inha University Incheon 22212 Republic of Korea;Department of Chemistry Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea;

关键词: energy transfer;    Förster resonance energy transfer (FRET);    light harvesting;    multichromophore systems;   

DOI  :  10.1002/advs.202001623

来源: DOAJ

【 摘 要 】

Abstract Multichromophore systems (MCSs) are envisioned as building blocks of molecular optoelectronic devices. While it is important to understand the characteristics of energy transfer in MCSs, the effect of multiple donors on energy transfer has not been understood completely, mainly due to the lack of a platform to investigate such an effect systematically. Here, a systematic study on how the number of donors (nD) and interchromophore distances affect the efficiency of energy transfer (ηFRET) is presented. Specifically, ηFRET is calculated for a series of model MCSs using simulations, a series of multiporphyrin dendrimers with systematic variation of nD and interdonor distances is synthesized, and ηFRETs of those dendrimers using transient absorption spectroscopy are measured. The simulations predict ηFRET in the multiporphyrin dendrimers well. In particular, it is found that ηFRET is enhanced by donor‐to‐donor energy transfer only when structural heterogeneity exists in an MCS, and the relationships between the ηFRET enhancement and the structural parameters of the MCS are revealed.

【 授权许可】

Unknown