@inproceedings{f2126f5823564c108a1285c036cf55cb,
title = "Deep level defects in N+-CdS/P-CdTe solar cells",
abstract = "We characterize the thin film n+-CdS/p-CdTe solar cells made with evaporated Cu as a primary back contact, using the temperature dependence of the reverse bias diode current (J-V-T) to determine the energy levels of deep defects. Since the solar cell quickly degrades (probably because of the well-established Cu diffusion from the back ohmic contact into CdTe) with measurement at temperatures greater than ∼100°C, measurements are done below this temperature (∼100°C). The results of our J-V-T measurements on solar cells made at NJIT show that while modest amounts of Cu enhance cell performance, an excessive high temperature process step degrades device quality and reduces efficiency. Results identify the physical trap though the energy (activation) level. The location of and the amount of trap are derived from the voltage dependence of diode leakage using a Shockley-Read-Hall (SRH) recombination model.",
author = "P. Kharangarh and Z. Cheng and G. Liu and Georgiou, {G. E.} and Chin, {K. K.}",
year = "2013",
doi = "10.1002/9781118585160.ch27",
language = "English (US)",
isbn = "9781118580981",
series = "Ceramic Transactions",
publisher = "American Ceramic Society",
pages = "297--302",
booktitle = "Materials Challenges in Alternative and Renewable Energy II - A Collection of Papers Presented at the Materials Challenges in Alternative and Renewable Energy Conference",
address = "United States",
note = "2nd Materials Challenges in Alternative and Renewable Energy, Energy 2012 ; Conference date: 26-02-2012 Through 01-03-2012",
}