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M. Z. PAKHURUDDIN1,* , K. IBRAHIM1, A. ABDUL AZIZ1
This paper studies relationship between thermal annealing and optical transmission of polyethylene terephthalate (PET) for applications in superstrate-oriented in thin film silicon solar cells. Differential scanning calorimetry (DSC) reveals that the original PET sample is semi-crystalline in nature with crystallinity (Xc) of 25.094%. Plot of enthalpy of fusion (ΔHf) and Xc of samples with increased annealing temperature (t = 60 min) illustrates that both parameters increase almost linearly with increased annealing temperature. Optical transmission measurement shows that the original PET has a very high transmission (around 85%) in the visible and infra-red (IR) region, making it suitable as a superstrate material in thin film silicon solar cells. However, transmission decreases with increased temperature and is believed to be due to scattering effects of the incident light by various sizes of growing crystallites within the annealed samples. Correlation plot between optical transmission and Xc of the annealed samples shows that as Xc increases, the optical transmission reduces gradually until a sharp reduction at Xc of more than 28% (i.e. at temperature ≥ 180°C). These effects are very critical in the fabrication of thin film silicon solar cells in superstrate orientation but pose no issues for substrate orientation..
Polyethylene terephthalate, Crystallinity, Transmission, Thin film silicon solar cells.
M. Z. PAKHURUDDIN, K. IBRAHIM, A. ABDUL AZIZ, Studies of thermal annealing and optical transmission of PET plastic for applications in superstrate-oriented thin film silicon solar cells, Optoelectronics and Advanced Materials - Rapid Communications, 8, 9-10, September-October 2014, pp.869-872 (2014).
Submitted at: June 25, 2014
Accepted at: Sept. 11, 2014
Optoelectronics and Advanced Materials - Rapid Communications
(2023): 0.5 - 2023 Journal Citation Reports (Clarivate Analytics, 2024)
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