Application of Laser Texturing in Silicon Solar Cell Technology

Recently, a lot of attempts have been directed to increase the solar energy coupling within an active media of a solar cell. Silicon and other materials, which are used as the active media in solar cell, reflect a considerable part of solar light due to a high refraction index, in particular, at oblique light incidence. In addition, only a small part of light is absorbed in the active layer of a thin film solar cells. We present the novel Laser Beam Interference Ablation technique for direct laser patterning of active materials. As a result, a coupling and localization of solar radiation is increased in modified structures. It should be noted that the light-absorbing structures are formed on the solar cell surface without additional steps in photo etching procedure. The proposed technique is under development for application in processing of both crystalline and thin-film silicon solar cells.Original Abstract: Siuo metu atliekama daug tyrimu siekiant padidinti saules sviesos sugerti aktyviame saules elemento pavirsiuje. Del didelio atspindzio koeficiento silicis ir kitos medziagos, naudojamos saules elementu gamyboje, atspindi labai krintancios sviesos dali, ypac krintancios dideliais kritimo kampais. Siame darbe pateikiamas naujas lazerio spindulio interferencijos teksturavimo metodas aktyviems saules elemento pavirsiams teksturuoti. Saules elementas taikant si metoda teksturuojamas nenaudojant jokiu papildomu technologiniu proceduru, pvz., fotorezisto uznesimo ir eksponavimo per sablona, esdinimo ir kt. Optiniu savybiu tyrimai parade, kad lazerinis teksturavimas yra perspektyvi technologija formuojant saules energija koncentruojancius pavirsius.