ELECTRONIC LEVELS ORDERING IN ALPHA-SEXITHIENYL

被引：34

作者：

ZAMBONI, R ^{[1
]}

PERIASAMY, N ^{[1
]}

RUANI, G ^{[1
]}

TALIANI, C ^{[1
]}

机构：

[1] TATA INST FUNDAMENTAL RES,BOMBAY 400005,INDIA

来源：

SYNTHETIC METALS | 1993年 / 54卷 / 1-3期

关键词：

D O I：

10.1016/0379-6779(93)91045-4

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The electronic level ordering in a polycrystalline thin film of alpha-sexithienyl (T6) has been determined by photoluminescence, one- and two-photon excitation, and photoconductivity measurements. The lowest 1B-1(u) Frenkel exciton is located at 17 452 cm-1. From site-selective photoluminescence we locate an extended inhomogeneous distribution of localized isolated T6 levels (X-traps) below the 1B-1(u) Frenkel exciton extending for 2000 cm-1. The origin of the lowest 2(1)A(g) Frenkel exciton is located at 18 350 cm-1, i.e. 898 cm-1 above the 1B-1(u). The photoconductivity action spectrum shows an onset at about the same energy of the 2(1)A(g) exciton band and reaches a maximum 1450 cm-1 above the 1B-1(u) exciton band. T6 is proposed as a good model compound for real polythiophene. The difference in energetics and photophysical properties due to different electronic correlation effects between polyenes and polythiophene is discussed.

引用

页码：57 / 66

页数：10

共 27 条

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