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Design and optical characterisation of an efficient light trapping structure for dye-sensitized solar cell integrated windows

Knott, Andrew; Liu, Xiao; Makarovskiy, Oleg; O'Shea, James; Tuck, Chris; Wu, Yupeng


Andrew Knott

Xiao Liu

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Associate Professor and Reader Inphysics

Professor of Building Physics


Windows integrated with semi-transparent photovoltaics (PVs) such as Dye-Sensitized Solar Cells (DSSCs) show good potential in improving building performance, in term of providing daylight, reducing unnecessary solar heat gain and also generating electricity onsite. However, low cell efficiency remains an obstacle for their applications in windows. Using light trapping structures in DSSCs shows potentially to improve solar to electrical conversion efficiency. In this work, different pyramid-patterned titanium dioxide (TiO2) geometries are designed to enhance the photon absorption in DSSCs, and characterised using a Monte-Carlo algorithm based 3D ray-tracing simulation. Various studies were carried out under average irradiation, spectrum dependent irradiation and different solar incidental angles, respectively. The simulation results at the average irradiation wavelength (540 nm) were compared to those from a previous study using Scanning Photocurrent Microscopy (SPCM) and a reasonable agreement has been achieved. It was found that the structure based on the pyramid array of side wall angle 54.7° can significantly enhance light absorption by up to ~25% and the maximum achievable photocurrent density (MAPD) by up to ~45% across the spectrum of 380-800 nm, when compared to a planar control counterpart.


Knott, A., Liu, X., Makarovskiy, O., O'Shea, J., Tuck, C., & Wu, Y. (2019). Design and optical characterisation of an efficient light trapping structure for dye-sensitized solar cell integrated windows. Building Simulation, 12(1), 41-49.

Journal Article Type Article
Acceptance Date Oct 3, 2018
Online Publication Date Nov 19, 2018
Publication Date Feb 1, 2019
Deposit Date Oct 9, 2018
Publicly Available Date Nov 20, 2019
Journal Building Simulation
Print ISSN 1996-3599
Electronic ISSN 1996-8744
Publisher Springer Publishing Company
Peer Reviewed Peer Reviewed
Volume 12
Issue 1
Pages 41-49
Keywords Light trapping; Ray tracing; Pyramid; Pattern; MAPD; Wavelength
Public URL
Publisher URL
Additional Information Received: 28 June 2018; Revised: 12 August 2018; Accepted: 30 September 2018; First Online: 19 November 2018


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