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Photocurrent increase in n-i-p thin film silicon solar cells by guided mode excitation via grating coupler

2010; American Institute of Physics; Volume: 96; Issue: 21 Linguagem: Inglês

10.1063/1.3435481

1520-8842

Karin Söderström, Franz‐Josef Haug, Jordi Escarré, O. Cubero, Christophe Ballif,

Optical Coatings and Gratings

Angle resolved measurements of the external quantum efficiency of n-i-p single junction amorphous solar cell deposited on a grating structure show clearly defined peaks of enhanced photocurrent in the weakly absorbing region between 1.6 and 2.15 eV. We explain these absorption phenomena and their angular variation with the excitation of guided modes via grating coupling. Calculation using an equivalent flat multilayer system permits to relate the theoretical values with the experimental data.