Slayt 1 - İstanbul Üniversitesi
İSTANBUL ÜNİVERSİTESİ FİZİK BÖLÜMÜ SEMİNERİ Lateral Current Collection in nipi Structured GaInNAs Solar Cells Prof. Dr. Naci Balkan University of Essex, School of computer Science and Electronic Engineering Colchester, UK The ability of GaInNAs alloys (dilute nitrides) to have band gaps significantly lower than GaAs but remain lattice matched to it makes them an interesting material for III-V tandem solar cells. However, the low diffusion length in dilute nitride material implies that it is impossible to produce efficient cells using conventional designs. Instead we propose a novel structure where the current collection is by the drift of majority carriers and the poor low diffusion length becomes insignificant. GaInNAs nipi structures alone should reach AM1.5G one sun efficiencies as high as 15 % and when incorporated in a GaInP / GaAs / 1eV cell may reach efficiencies as high as 35 %. Tarih : 04 Mart 2015, Çarşamba Saat : 15:00 (14:45’te çay ve ikram servisimiz olacaktır.) Yer : Fizik Bölümü, Fikret Kortel Seminer Salonu İletişim: Yrd.Doç.Dr. Feyza Güzelçimen, [email protected]
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