Acceleration of Singlet Fission in an Aza-Derivative of TIPS-Pentacene

被引：91

作者：

Herz, Julia ^{[1
]}

Buckup, Tiago ^{[1
]}

Paulus, Fabian ^{[2
]}

Engelhart, Jens ^{[2
]}

Bunz, Uwe H. F. ^{[2
,3
]}

Motzkus, Marcus ^{[1
,3
]}

机构：

[1] Heidelberg Univ, Phys Chem Inst, D-69120 Heidelberg, Germany

[2] Heidelberg Univ, Organ Chem Inst, D-69120 Heidelberg, Germany

[3] Heidelberg Univ, Ctr Adv Mat, D-69120 Heidelberg, Germany

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2014年 / 5卷 / 14期

关键词：

THIN-FILM TRANSISTORS; EXCITON-FISSION; TRANSIENT ABSORPTION; TRANSPORT; DYNAMICS; STATE;

D O I：

10.1021/jz501102r

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：

The influence of the carbon to nitrogen substitution on the photoinduced dynamics of TIPS-pentacene was investigated by ultrafast transient absorption measurements on spin-coated thin films in the visible and in the near-infrared spectral region. A global target analysis was performed to provide a detailed picture of the excited-state dynamics. We found that the chemical modification has a high impact on the triplet formation and leads to shorter dynamics; hence it speeds up the singlet fission process. A faster relaxation from the singlet into the triplet manifold implies a higher efficiency because other relaxation channels are avoided. The air-stable aza-derivatives have the potential to exceed the energy conversion efficiency of TIPS-pentacene.

引用

页码：2425 / 2430

页数：6

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