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Proceedings Paper

Selective optical contacting for solar spectrum management
Author(s): Jianfeng Yang; Weijian Chen; Bo Wang; Zhilong Zhang; Shujuan Huang; Santosh Shrestha; Xiaoming Wen; Robert Patterson; Gavin Conibeer
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Paper Abstract

Solar spectrum management using up/down conversion is an important method to improve the photovoltaic energy conversion efficiency. It asks for a monochromatic luminescence absorption at the band edge of the photovoltaic device to reduce both the sub-band-gap and over-band-gap energy losses. Here, we demonstrate an energy selective optical contacting concept to improve the luminescence transfer efficiency for spectrum management. By increasing both the luminescence emission and re-absorption ability through photonic resonance, an efficient photon transfer channel could be established between the luminescence emitter and the photovoltaic component in a near-field region. This concept is not only able to compensate the insufficient band edge absorption ability of the photovoltaic device, but also to break the far-field limitation of luminescence radiation. The energy selection on the optical spectrum naturally imposed by the mode resonance is also helpful to improve the monochromaticity of the luminescence yield. In this paper, a photonic crystal cavity is used to realize the optical contacting concept between a thin silicon film and spectrum converter. The optical power and photon flux transferred between different components are calculated analytically using the electromagnetic Green’s function. The corresponding radiative dipole moment is estimated by the fluctuation-dissipation theorem. The example shows an over 80 times enhancement in the luminescence absorbance by the silicon layer, illustrating the great potential of this concept to be applied on nano-structured photovoltaic devices.

Paper Details

Date Published: 23 February 2017
PDF: 6 pages
Proc. SPIE 10099, Physics, Simulation, and Photonic Engineering of Photovoltaic Devices VI, 1009917 (23 February 2017); doi: 10.1117/12.2251197
Show Author Affiliations
Jianfeng Yang, The Univ. of New South Wales (Australia)
Weijian Chen, The Univ. of New South Wales (Australia)
Bo Wang, The Univ. of New South Wales (Australia)
Zhilong Zhang, The Univ. of New South Wales (Australia)
Shujuan Huang, The Univ. of New South Wales (Australia)
Santosh Shrestha, The Univ. of New South Wales (Australia)
Xiaoming Wen, Swinburne Univ. of Technology (Australia)
Robert Patterson, The Univ. of New South Wales (Australia)
Gavin Conibeer, The Univ. of New South Wales (Australia)

Published in SPIE Proceedings Vol. 10099:
Physics, Simulation, and Photonic Engineering of Photovoltaic Devices VI
Alexandre Freundlich; Laurent Lombez; Masakazu Sugiyama, Editor(s)

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