Khelifi, S.; Verschraegen, J.; Burgelman, M.; Belghachi, A. - In: Renewable Energy 33 (2008) 2, pp. 293-298
Recently, the impurity photovoltaic effect (IPV) was proposed to improve the solar cell performance. Free electron–hole pairs can be generated in a two-step process involving an impurity level in the energy gap and two lower-energy photons: first electrons are optically excited from the...