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Progress in p(+)n InP solar cells fabricated by thermal diffusionIn SPRAT XI, we proposed that p(sup +)n diffused junction InP solar cells should exhibit a higher conversion efficiency than their n(sup +)p counterparts. This was mainly due to the fact that our p(sup +)n (Cd,S) cell structures consistently showed higher V (sub OC) values than our n(sup +)p (S,Cd) structures. The highest V(sub OC) obtained with the p(sup +)n (Cd,S) cell configuration was 860 mV, as compared to the highest V(sub OC) 840 mV obtained with the n(sup +)p (S,Cd) configuration (AMO, 25 C). In this work, we present the performance results of our most recent thermally diffused cells using the p(sup +)n (Cd,S) structure. We have been able to fabricate cells with V(sub OC) values approaching 880 mV. Our best cell with an unoptimized front contact grid design (GS greater than or equal to 10%) showed a conversion efficiency of 13.4% (AMO, 25 C) without an AR coating layer. The emitter surface was passivated by a -50A P rich oxide. Achievement of such high V(sub OC) values was primarily due to the fabrication of emitter surfaces, having EPD densities as low as 2E2 cm(sup -2) and N(sub a)N(sub d) of about 3E18 cm (sup -3). In addition, our preliminary investigation of p(sup +)n structures seem to suggest that Cd-doped emitter cells are more radiation resistant than Zn-doped emitter cells against both high energy electron and proton irradiation.
Document ID
19950002248
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Faur, Mircea
(Cleveland State Univ. OH., United States)
Faur, Maria
(Cleveland State Univ. OH., United States)
Flood, D. J.
(NASA Lewis Research Center Cleveland, OH, United States)
Brinker, D. J.
(NASA Lewis Research Center Cleveland, OH, United States)
Weinberg, I.
(NASA Lewis Research Center Cleveland, OH, United States)
Fatemi, N. S.
(NASA Lewis Research Center Cleveland, OH, United States)
Vargas-Aburto, Carlos
(NASA Lewis Research Center Cleveland, OH, United States)
Goradia, C.
(NASA Lewis Research Center Cleveland, OH, United States)
Goradia, Manju
(NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
August 17, 2013
Publication Date
January 1, 1992
Publication Information
Publication: Twelfth Space Photovoltaic Research and Technology Conference (SPRAT 12)
Subject Category
Energy Production And Conversion
Accession Number
95N70368
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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