Depletion of PCBM at the Cathode Interface in P3HT/PCBM Thin Films as Quantified via Neutron Reflectivity Measurements

被引：161

作者：

Parnell, Andrew J. ^{[1
]}

Dunbar, Alan D. F. ^{[2
]}

Pearson, Andrew J. ^{[1
]}

Staniec, Paul A. ^{[1
]}

Dennison, Andrew J. C. ^{[1
]}

Hamamatsu, Hiroshi ^{[1
]}

Skoda, Maximilian W. A. ^{[3
]}

Lidzey, David G. ^{[1
]}

Jones, Richard. A. L. ^{[1
]}

机构：

[1] Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, England

[2] Univ Sheffield, Dept Chem & Proc Engn, Sheffield S1 3JD, S Yorkshire, England

[3] Rutherford Appleton Lab, ISIS Pulsed Neutron & Muon Source, Sci & Technol Facil Council, Didcot OX11 0QX, Oxon, England

来源：

ADVANCED MATERIALS | 2010年 / 22卷 / 22期

基金：

英国工程与自然科学研究理事会;

关键词：

POLYMER SOLAR-CELLS; MORPHOLOGY; EFFICIENCY; ORGANIZATION; IMPACT; BLEND;

D O I：

10.1002/adma.200903971

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Using neutron reflectivity, self-stratification in a model P3HT/PCBM blend is observed. The as-spun and solvent-annealed films show a depletion of PCBM near the top surface and enrichment of PCBM at the substrate (see figure). Depletion of PCBM at the cathode interface in a photovoltaic device could act as a barrier to efficient electron extraction. On thermal annealing, the PCBM depleted region is eliminated; an effect that partially explains the improvement of P3HT/PCBM devices on thermal annealing.

引用

页码：2444 / +

页数：5

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