Photo-oxidation and ozonization of poly(3-hexylthiophene) thin films as studied by UV/VIS and photoelectron spectroscopy

被引：119

作者：

Hintz, H. ^{[1
]}

Egelhaaf, H. -J. ^{[2
]}

Peisert, H. ^{[1
]}

Chasse, T. ^{[1
]}

机构：

[1] Univ Tubingen, Inst Phys & Theoret Chem, D-72076 Tubingen, Germany

[2] Konarka Technol GmbH, D-90443 Nurnberg, Germany

来源：

POLYMER DEGRADATION AND STABILITY | 2010年 / 95卷 / 05期

关键词：

P3HT; Degradation; Ozone; Photo-oxidation; Kinetics; Photoelectron spectroscopy; ELECTRONIC CONDUCTING POLYMERS; OZONE; POLYTHIOPHENE; STATE;

D O I：

10.1016/j.polymdegradstab.2010.02.004

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The kinetics and the mechanisms of degradation of thin P3HT layers have been investigated quantitatively for ozonization and photo-oxidation. Both, decay kinetics and product evolution of the polymer degradation are monitored by in situ UV/VIS and X-ray photoelectron spectroscopy (XPS). The degradation pathways of ozonization and photo-oxidation of P3HT turn out to be significantly different. Ozone attacks the thiophene units mainly by direct addition to the double bonds, leading to the loss of UV/VIS absorption, while the aliphatic side chains [1] are hardly affected. During photo-oxidation, the polymer is primarily attacked at the alkyl side chain which leads to the formation of reactive peroxide species. These subsequently cause the oxidation of sulfur and concomitantly the destruction of the thiophene ring, resulting in the loss of absorption. From the kinetics of the blue shift of the optical absorption it is concluded that the polymer is mainly attacked at the terminal thiophene rings the case of photo-oxidation whereas ozone attacks positions more or less randomly distributed along the chain. The rate of photo-oxidation under AM 1.5 conditions is at least one order of magnitude faster than the decomposition of P3HT by ozone. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：818 / 825

页数：8

共 34 条

[21]

2-9

[22] Doping effects and reversibility studies on gas-exposed α-sexithiophene thin films [J].

Kendrick, C ;

Semancik, S .

JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS, 1998, 16 (05) :3068-3075

[23]

Liao H.-H., 2008, J APPL PHYS, P103

[24] Oxygen-induced quenching of photoexcited states in polythiophene films [J].

Lüer, L ;

Egelhaaf, HJ ;

Oelkrug, D ;

Cerullo, G ;

Lanzani, G ;

Huisman, BH ;

de Leeuw, D .

ORGANIC ELECTRONICS, 2004, 5 (1-3) :83-89

[25] The mechanism of photo- and thermooxidation of poly(3-hexylthiophene) (P3HT) reconsidered [J].

Manceau, Matthieu ;

Rivaton, Agnes ;

Gardette, Jean-Luc ;

Guillerez, Stephane ;

Lemaitre, Noella .

POLYMER DEGRADATION AND STABILITY, 2009, 94 (06) :898-907

[26] Photoimpedance spectroscopy of poly(3-hexyl thiophene) metal-insulator-semiconductor diodes [J].

Meijer, EJ ;

Mangnus, AVG ;

Huisman, BH ;

't Hooft, GW ;

de Leeuw, DM ;

Klapwijk, TM .

SYNTHETIC METALS, 2004, 142 (1-3) :53-56

[27] Ozonization of electronic conducting polymers, Part III: The action of ozone on poly[3-pentylthiophene] film [J].

Nowaczyk, J. ;

Olszowy, P. ;

Cysewski, P. ;

Nowaczyk, A. ;

Czerwinski, W. .

POLYMER DEGRADATION AND STABILITY, 2008, 93 (07) :1275-1283

[28] Ozonization of electronic conducting polymers: II. Degradation or doping [J].

Nowaczyk, Jacek ;

Czerwinski, Wojciech ;

Olewnik, Ewa .

POLYMER DEGRADATION AND STABILITY, 2006, 91 (09) :2022-2029

[29]

Rabek J.F., 1995, POLYM PHOTODEGRADATI

[30] Reactions of ozone with double bonds in polymer and biosystem chemistry [J].

Razumovskii, S. D. ;

Lisitsyn, D. M. .

POLYMER SCIENCE SERIES A, 2008, 50 (12) :1187-1197

← 1 2 3 4 →