Study of Open-Circuit Voltage in CdTe/MgCdTe Double-Heterostructure Solar Cells with Different Hole Contacts

Jia DIng, Yong Hang Zhang

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    This paper reports a comparison study of open-circuit voltage (VOC) in three kinds of CdTe/MgCdTe doubleheterostructure solar cells featuring p-type a-Si:H, ZnTe:As or ZnTe:Cu as hole contact layers, respectively. Devices with p-type a-Si:H demonstrated a record VOC of 1.1 V while the VOC of the devices with p-type ZnTe:As and ZnTe:Cu drop below 0.9 V C-V measurements and time-resolved photoluminescence measurements reveal built-in voltages (Vbi) of 1.20 V, 1.23 V and 0.90 V, and minority carrier lifetime 300 ns, 52 ns and 170 ns for devices with different types of hole contacts, respectively. For the devices with a ZnTe:As layer, an increase in nonradiative recombination rate and a reduction in VOC are observed due to the misfit dislocations at the ZnTe/MgCdTe interface. The low VOC seen in the devices with a ZnTe: Cu layer is mainly limited by their low Vbi.

    Original languageEnglish (US)
    Title of host publication2019 IEEE 46th Photovoltaic Specialists Conference, PVSC 2019
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    Pages21-24
    Number of pages4
    ISBN (Electronic)9781728104942
    DOIs
    StatePublished - Jun 2019
    Event46th IEEE Photovoltaic Specialists Conference, PVSC 2019 - Chicago, United States
    Duration: Jun 16 2019Jun 21 2019

    Publication series

    NameConference Record of the IEEE Photovoltaic Specialists Conference
    ISSN (Print)0160-8371

    Conference

    Conference46th IEEE Photovoltaic Specialists Conference, PVSC 2019
    CountryUnited States
    CityChicago
    Period6/16/196/21/19

    Keywords

    • Cadmium telluride (CdTe)
    • double heterostructure
    • hole contact
    • open-circuit voltage

    ASJC Scopus subject areas

    • Control and Systems Engineering
    • Industrial and Manufacturing Engineering
    • Electrical and Electronic Engineering

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  • Cite this

    DIng, J., & Zhang, Y. H. (2019). Study of Open-Circuit Voltage in CdTe/MgCdTe Double-Heterostructure Solar Cells with Different Hole Contacts. In 2019 IEEE 46th Photovoltaic Specialists Conference, PVSC 2019 (pp. 21-24). [8980668] (Conference Record of the IEEE Photovoltaic Specialists Conference). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/PVSC40753.2019.8980668