Intrinsic excitonic luminescence in odd and even numbered oligothiophenes

被引：49

作者：

Meinardi, F

Cerminara, M

Sassella, A

Borghesi, A

Spearman, P

Bongiovanni, G

Mura, A

Tubino, R

机构：

[1] Univ Milano Bicocca, INFM, I-20125 Milan, Italy

[2] Univ Milano Bicocca, Dept Mat Sci, I-20125 Milan, Italy

[3] Sch Chem & Pharmaceut Sci, Kingston upon Thames KT1 2EE, Surrey, England

[4] Univ Cagliari, INFM, I-09042 Cagliari, Italy

[5] Univ Cagliari, Dept Phys, I-09042 Cagliari, Italy

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 89卷 / 15期

关键词：

D O I：

10.1103/PhysRevLett.89.157403

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The emission properties of crystalline oligothiophenes (OTs) are investigated and related to the different selection rules arising from the number of rings. In odd OT crystals the purely electronic emission is absent since the molecular A(1)-1B(1) transition dipoles cancel at the bottom of the excitonic band. On the contrary, in crystals of even OTs this transition is allowed due to the constructive interference of the off-axis components of the molecular transition dipole. It possesses a polarization in the herringbone plane and exhibits superradiant behavior.

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页码：157403/1 / 157403/4

页数：4

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