Increased upconversion performance for thin film solar cells: a trimolecular composition

被引：80

作者：

Cheng, Yuen Yap ^{[1
]}

Nattestad, Andrew ^{[2
]}

Schulze, Tim F. ^{[3
]}

MacQueen, Rowan W. ^{[4
]}

Fueckel, Burkhard ^{[4
]}

Lips, Klaus ^{[3
]}

Wallace, Gordon G. ^{[2
]}

Khoury, Tony ^{[4
]}

Crossley, Maxwell J. ^{[4
]}

Schmidt, Timothy W. ^{[1
]}

机构：

[1] UNSW, Sch Chem, Sydney, NSW 2052, Australia

[2] Univ Wollongong, ARC Ctr Excellence Electromat Sci ACES, Intelligent Polymer Res Inst IPRI, North Wollongong, NSW 2522, Australia

[3] Helmholtz Zentrum Berlin, Inst Silicon Photovolta, D-12489 Berlin, Germany

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

来源：

CHEMICAL SCIENCE | 2016年 / 7卷 / 01期

基金：

澳大利亚研究理事会;

关键词：

TRIPLET-TRIPLET ANNIHILATION; METAL (II)-OCTAETHYL PORPHYRINS; LOW-POWER; TO-BLUE; EFFICIENCY; LIGHT; FLUORESCENCE; EXCITATION; LIMIT; COMPLEXES;

D O I：

10.1039/c5sc03215f

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Photochemical upconversion based on triplet-triplet annihilation (TTA-UC) is employed to enhance the short-circuit currents generated by two varieties of thin-film solar cells, a hydrogenated amorphous silicon (a-Si:H) solar cell and a dye-sensitized solar cell (DSC). TTA-UC is exploited to harvest transmitted sub-bandgap photons, combine their energies and re-radiate upconverted photons back towards the solar cells. In the present study we employ a dual-emitter TTA-UC system which allows for significantly improved UC quantum yields as compared to the previously used single-emitter TTA systems. In doing so we achieve record photo-current enhancement values for both the a-Si:H device and the DSC, surpassing 10(-3) mA cm(-2) sun(-2) for the first time for a TTA-UC system and marking a record for upconversion-enhanced solar cells in general. We discuss pertinent challenges of the TTA-UC technology which need to be addressed in order to achieve its viable device application.

引用

页码：559 / 568

页数：10

共 85 条

[1] Near infrared up-conversion in organic photovoltaic devices using an efficient Yb3+:Ho3+ Co-doped Ln2BaZnO5 (Ln = Y, Gd) phosphor [J].