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Your search keyword '"Kiem Bui"' showing total 2 results
Start Over Author "Kiem Bui" Topic solar cell
2 results on '"Kiem Bui"'

1. Final qualification test results of XTJ triple junction space solar cell to AIAA - S-111 - 2005 and Spectrolab test standards

Author

Rina Bardfield, Surya K. Sharma, Kaveh Rouhani, Christopher M. Fetzer, Bongim Jun, J. Hanley, Kiem Bui, Clara J. Cho, William G. Wise, Jerry Z. Wu, Ricardo Anaya, Dennis A. Russell, M.S. Gillanders, Philip Leung, Dennis Hom, and D.D. Krut

Subjects
Materials science, Operating temperature, business.industry, law, Triple junction, Solar cell, Electrical engineering, Thermal cycle, Aerospace engineering, business, Solar absorptance, law.invention
Abstract

Spectrolab successfully completed the qualification of its latest and final triple junction space solar cell, 30% class XTJ (neXt Triple Junction), per AIAA S-111-2005 and Spectrolab test standards. The final qualification and characterization test results are presented in this paper. XTJ exhibits a 4.2 % power gain over Spectrolab's current space PV, UTJ, at both beginning of life and end of life. Moreover, nearly 3% lower solar absorptance of XTJ allows for a cooler operating temperature in a typical GEO mission. XTJ showed excellent front and backside welding contact integrities, insensitivity to ESDS, and negligible loss from humidity and GEO thermal cycle tests. Currently Spectrolab's large area XTJ (59.65cm2) is undergoing qualification per Spectrolab specified test standards.

Published
2010

2. Qualification status of 30% efficient next triple junction (XTJ) GaInP2/GaAs/Ge solar cells to AIAA S-111-2005 standard

Author

S. K. Sharma, M.S. Gillanders, Kiem Bui, Bongim Jun, Kaveh Rouhani, Dennis Hom, Christopher M. Fetzer, and Rina Bardfield

Subjects
Materials science, Maximum power principle, business.industry, law, Triple junction, Solar cell, Thermal cycle, Electrical engineering, Electrical performance, business, Engineering physics, law.invention
Abstract

Spectrolab presents the qualification status of its latest triple junction space solar cell, neXt Triple Junction (XTJ). The beginning of life efficiency averages 29.9% at maximum power (AM0, 28°C, 135.3 mW/cm2). The qualification in progress complies with the AIAA S-111-2005 standards for bare cell, CIC, and coupon level tests. Thermal cycle GEO coupons built for engineering confidence prior to the qualification showed excellent mechanical and electrical performance. Interim qualification status and test results are discussed.

Published
2009

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