The effect of copper on the sub-bandgap density of states of CdTe solar cells

Autor:	D. Westley Miller, Colin A. Wolden, Jennifer T. Heath, Charles W. Warren, Mark C. Lonergan, Jiaojiao Li, D. M. Meysing, Teresa M. Barnes
Rok vydání:	2015
Předmět:	Materials science Physics and Astronomy (miscellaneous) Band gap business.industry Photoconductivity Wide-bandgap semiconductor chemistry.chemical_element Quantum dot solar cell Copper Cadmium telluride photovoltaics chemistry Density of states Optoelectronics Spectroscopy business
Zdroj:	Applied Physics Letters. 106:203903
ISSN:	1077-3118 0003-6951
Popis:	Two optical sub-bandgap transitions in CdTe thin-film solar cells have been identified using detailed transient photocapacitance and transient photocurrent spectroscopy measurements. A broad response centered at EV + 0.9 eV directly correlates with the quantity of Cu present in the absorber layer, while a second response at EV + 1.2 eV does not depend on Cu or Zn and may be an intrinsic defect. These results demonstrate the influence of Cu on the sub-bandgap density of states of CdTe, and they are critical to understanding, modeling, and improving its optoelectronic properties.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::0c3edc5640592d553291e3629bed4d19 https://doi.org/10.1063/1.4921577 Zobrazit plný text záznamu