Thermal stress analysis of mesoporous perovskite solar cell by finite element method

摘要: For nearly five years, the photoelectric conversion efficiency of perovskite-based solar cells are extraordinarily developed at a high speed, showing good application prospect. It is necessary to further optimize devices and make them industrially feasible. The different temperature requirements perovskite during preparation process will result in undesirable thermal stresses. There have already existed number papers concerning methods improve power cell. However, properties laminated structure cell, which significantly affect long-time reliability cell packaging, rarely been discussed. Different loads taken into account obtain resulting stresses this paper. fabrication processing reproduced FEM simulations able directly analyze internal within between layers. goal develop systematic understanding behavior process. study figures out that maximum Mises located central area for upper But stress on bottom layer occurs fringe etching groove. large accumulated plastic strain center cause crack initiation location then may continue grow groove or even delamination. Due mismatch coefficient expansion, warpage evident alumina film molybdenum oxide film, had bad influence uniformity following encapsulation meaningful provide reference continuous improvement efficiency. also be discussed reduce minimum value.