Promotion of Fast and Efficient Singlet Fission Process of PDI Dimers by Selenium Substitution

被引：1

作者：

Yang, Yubo ^{[1
]}

Su, Wenli ^{[1
]}

Wang, Hang ^{[2
]}

Bao, Xiaotian ^{[1
,3
]}

Liu, Xinfeng ^{[3
,4
]}

Bo, Zhishan ^{[2
]}

Zhang, Wenkai ^{[5
,6
]}

机构：

[1] Beijing Normal Univ, Ctr Adv Quantum Studies, Sch Phys & Astron, Appl Opt Beijing Area Major Lab, Beijing 100875, Peoples R China

[2] Qingdao Univ, Coll Text & Clothing, State Key Lab Biofibers & Ecotext, Qingdao 266071, Peoples R China

[3] Natl Ctr Nanosci & Technol, CAS Key Lab Standardizat & Measurement Nanotechnol, Beijing 100190, Peoples R China

[4] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[5] Beijing Normal Univ, Ctr Adv Quantum Studies, Sch Phys & Astron, Appl Opt Beijing Area Major Lab,Minist Educ, Beijing 100875, Peoples R China

[6] Beijing Normal Univ, Key Lab Multiscale Spin Phys, Minist Educ, Beijing 100875, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2024年 / 128卷 / 29期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

ORGANIC SOLAR-CELLS; PERYLENE DIIMIDES; EXCIMER FORMATION; CHARGE-TRANSFER; PHYSICAL-PROPERTIES; STATE; DYNAMICS; NANOPARTICLES;

D O I：

10.1021/acs.jpcb.4c01744

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：

Singlet fission (SF) is a triplet generation mechanism capable of turning a singlet exciton into two triplet excitons. It has the potential to enhance the power conversion efficiency of single-junction solar cells. Perylene diimides (PDIs) are a class of dye molecules with photovoltaic properties and are beginning to receive more and more attention due to their potential for SF. Here, we report a selenium-substituted PDI dimer, Se-PDI-II, and we studied its SF mechanism by using steady-state, transient absorption, and time-resolved photoluminescence spectroscopy. Compared with the unsubstituted dimer PDI-II, we found that the introduction of selenium atoms can suppress excimer emission during the SF process, showing much higher SF efficiency and triplet yield.

引用

页码：7219 / 7226

页数：8

共 1 条

[1] High-Yield Generation of Triplet Excited States by an Efficient Sequential Photoinduced Process from Energy Transfer to Singlet Fission in Pentacene-Modified CdSe/ZnS Quantum Dots
Sakai, Hayato
Inaya, Ryutaro
Tkachenko, Nikolai V.
Hasobe, Taku
CHEMISTRY-A EUROPEAN JOURNAL, 2018, 24 (64) : 17062 - 17071

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