Effects of intermolecular interactions on photoluminescence efficiency of crystalline thienylene-S,S-dioxide molecular semiconductors

被引：10

作者：

Della Sala, F

Gigli, G

Raganato, MF

Anni, M

Pisignano, D

Cingolani, R

Favaretto, L

Sotgiu, G

Barbarella, G

Antolini, L

机构：

[1] Univ Lecce, Dipartimento Ingn Innovaz, Natl Nanotechnol Lab, INFM, I-73100 Lecce, Italy

[2] CNR, ISOF, I-40129 Bologna, Italy

[3] Univ Modena, Dipartimento Chim, I-41100 Modena, Italy

来源：

ORGANIC ELECTRONICS | 2004年 / 5卷 / 1-3期

关键词：

photoluminescence; interchain interactions; quantum yield; viscosity; polythiophenes and derivatives;

D O I：

10.1016/j.orgel.2003.11.002

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effects of intermolecular interactions on the photoluminescence (PL) quantum efficiency of differently substituted thienylene-S,S-dioxide derivatives in the crystalline phase are investigated. The exciton resonance interactions and the transfer integrals are evaluated using a quantum chemistry approach by considering the supramolecular structures obtained from X-ray data. Two classes of thienylene-S,S-dioxides are investigated: (1) rigid, fused ring compounds, for which the PL quantum efficiency can be well correlated with the rate of formation of non-radiatively decaying charge-transfer pairs upon photoexcitation; (2) flexible oligothiophenes for which the high PL quantum efficiency in the solid-state is assigned to a decrease of intramolecular internal conversion process, as confirmed by time-resolved PL measurements in solvents of different viscosity. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：129 / 134

页数：6

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[11] Interchain interaction and Davydov splitting in polythiophene crystals:: An ab initio approach [J].