A Quantitative Study of PCBM Diffusion during Annealing of P3HT: PCBM Blend Films

被引：239

作者：

Watts, Benjamin ^{[2
]}

Belcher, Warwick J. ^{[1
]}

Thomsen, Lars ^{[1
]}

Ade, Harald ^{[2
]}

Dastoor, Paul C. ^{[1
]}

机构：

[1] Univ Newcastle, Sch Math & Phys Sci, Callaghan, NSW 2308, Australia

[2] N Carolina State Univ, Dept Phys, Raleigh, NC 27695 USA

来源：

MACROMOLECULES | 2009年 / 42卷 / 21期

关键词：

BULK-HETEROJUNCTION POLYMER; MORPHOLOGY EVOLUTION; SOLAR-CELLS; STABILITY; NETWORK;

D O I：

10.1021/ma901444u

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Scanning transmission X-ray microscopy has been used to quanutatively map the composition of P3HT PCBM blend films in the vicinity of PCBM crystals formed during annealing at 140 degrees C The observed PCBM concentration profiles around these crytals have been fitted to Fick's second law of diffusion and the dirfusion constant found to be 2 5 x 10(-14) m(2) s(-1) The PCBM concentration at the crystal boundary was found to be 19% (v/v) and is interpreted, together with the annealing temperature of 140 degrees C, as a point on the biomodal line of the composition-temperature phase diagram P3HT is observed to be bulk-dominated, in contrast to the surface/interface-dommated diffusion observed in MDMO-PPV:PCBM blend films by Yang et al 1,2

引用

页码：8392 / 8397

页数：6

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