Abstract
, Phone: þ49 3641 206 459, Fax: þ49 3641 206 499During the preparation of silicon thin film solar cells on glasssubstrates by diode laser induced liquid phase crystallization(LPC), cracking is an issue. This is due to thermal stressescaused by high temperature gradients withinthe sample. In thispaper, the relation between thermal stress and the temperaturedistribution within the sample during LPC is discussed.Experiments for two sets of laser irradiation parameters weredoneleading to crack free or crackedcrystallization of the film.Additionally, the evolution of temperature during LPC wasmodeled numerically. Based on the simulation, the thermalstresses introduced were calculated. The complex viscoelasticproblem was simplified to an elastic multilayer model, whichcan be solved analytically. The theoretical results can explainthe experimental behavior.
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