Improving the light-harvesting of amorphous silicon solar cells with photochemical upconversion

被引：332

作者：

Cheng, Yuen Yap ^{[1
]}

Fueckel, Burkhard ^{[1
]}

MacQueen, Rowan W. ^{[1
]}

Khoury, Tony ^{[1
]}

Clady, Raphael G. C. R. ^{[1
]}

Schulze, Tim F. ^{[1
]}

Ekins-Daukes, N. J. ^{[2
,3
]}

Crossley, Maxwell J. ^{[1
]}

Stannowski, Bernd ^{[4
]}

Lips, Klaus ^{[5
]}

Schmidt, Timothy W. ^{[1
,6
]}

机构：

[1] Univ Sydney, Sch Chem, Sydney, NSW 2006, Australia

[2] Univ London Imperial Coll Sci Technol & Med, Dept Phys, London SW7 2AZ, England

[3] Univ London Imperial Coll Sci Technol & Med, Grantham Inst Climate Change, London SW7 2AZ, England

[4] Helmholtz Zentrum Berlin Mat & Energie, Competence Ctr Thin Film & Nanotechnol Photovolta, D-12489 Berlin, Germany

[5] Helmholtz Zentrum Berlin Mat & Energie, Inst Silicon Photovolta, D-12489 Berlin, Germany

[6] Univ Sydney, Inst Photon & Opt Sci, Sydney, NSW 2006, Australia

来源：

ENERGY & ENVIRONMENTAL SCIENCE | 2012年 / 5卷 / 05期

基金：

澳大利亚研究理事会;

关键词：

TRIPLET-TRIPLET ANNIHILATION; EFFICIENCY;

D O I：

10.1039/c2ee21136j

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Single-threshold solar cells are fundamentally limited by their ability to harvest only those photons above a certain energy. Harvesting below-threshold photons and re-radiating this energy at a shorter wavelength would thus boost the efficiency of such devices. We report an increase in light harvesting efficiency of a hydrogenated amorphous silicon (a-Si: H) thin-film solar cell due to a rear upconvertor based on sensitized triplet-triplet-annihilation in organic molecules. Low energy light in the range 600-750 nm is converted to 550-600 nm light due to the incoherent photochemical process. A peak efficiency enhancement of (1.0 +/- 0.2)% at 720 nm is measured under irradiation equivalent to (48 +/- 3) suns (AM1.5). We discuss the pathways to be explored in adapting photochemical UC for application in various single threshold devices.

引用

页码：6953 / 6959

页数：7

共 30 条

[11] Enhanced near-infrared response of a-Si:H solar cells with β-NaYF4:Yb3+ (18%), Er3+ (2%) upconversion phosphors [J].