Design considerations on GaInNAs solar cells with back surface reflectors

Antti Tukiainen, Arto Aho, Timo Aho, Ville Polojärvi, Mircea Guina

    Tutkimustuotos: AbstraktiTieteellinen

    Abstrakti

    We report on modeling of electrical characteristics of dilute nitride GaInNAs solar cells with specular and diffuse back surface reflectors. The paper concentrates on optimization of the GaInNAs junction thickness and doping level for various reflectors. Usually, it is considered that the doping level of GaInNAs should be clearly below 1×1016 cm-3 to be usable for active sub-junction material of high-efficiency triple junction solar cells. Here we show that this requirement can be alleviated by using high quality diffuse back surface reflectors and thus GaInNAs with background doping levels even exceeding 1×1016 cm-3 can be used for junction formation for high-efficiency multijunction solar cells. The reflectance of the back surface reflector is shown to affect the optimal GaInNAs thickness. The higher the reflectance the thinner layers can be used. We also show that the optimal GaInNAs layer thickness is different depending on whether the optimization is done for the short circuit current density or open circuit voltage.
    AlkuperäiskieliEnglanti
    TilaJulkaistu - 2017
    TapahtumaIEEE - 2017 IEEE 44th Photovoltaic Specialists Conference (PVSC) - the Marriott Wardman Park Hotel, , Washington D.C., Yhdysvallat
    Kesto: 25 kesäk. 201730 kesäk. 2017
    Konferenssinumero: 44

    Conference

    ConferenceIEEE - 2017 IEEE 44th Photovoltaic Specialists Conference (PVSC)
    LyhennettäPVSC
    Maa/AlueYhdysvallat
    KaupunkiWashington D.C.
    Ajanjakso25/06/1730/06/17

    Sormenjälki

    Sukella tutkimusaiheisiin 'Design considerations on GaInNAs solar cells with back surface reflectors'. Ne muodostavat yhdessä ainutlaatuisen sormenjäljen.

    Siteeraa tätä