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001024207 1001_ $$0P:(DE-Juel1)184652$$aChime, U.$$b0$$eCorresponding author
001024207 245__ $$aThin silicon heterojunction solar cells in perovskite shadow: Bottom cell prospective
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001024207 520__ $$aPerovskite/Silicon (Pero-Si) tandem with silicon heterojunction (SHJ) bottom cells is a promising highly efficient concept, which in the case of mass production will likely rely on the same wafer feedstock as the single junction Si solar cells. The thickness of these wafers is constantly decreasing for economic and sustainability reasons. We forecast that Si bottom cells for mass produced Pero-Si tandems will be based on wafers thinner than 100 μm. In our work we study challenges and opportunities related to this likely wafer thinning for the performance of the SHJ bottom cells operating in Perovskite shadow. We study SHJ cells prepared on 80 μm thick wafers in comparison to the reference cells based on 135 μm thick wafers addressing two issues: passivation and light management. Effects of passivating layer thickness, back reflector and antireflection coating are studied under AM1.5G standard test conditions, attenuated AM1.5G irradiance, and under Perovskite-filtered spectrum. We show that major wafer thickness reduction of 40% turns to only approx. 0.35%abs loss in the bottom cell efficiency. This minor loss can be reduced even further using highly technological ITO/MgF2/Ag back reflector and MgF2 anti-reflection coating. Our work shows that significant potential for Pero-Si tandems is waiting to be explored in the perovskite shadow from the SHJ bottom cell perspective.
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001024207 7001_ $$0P:(DE-Juel1)169946$$aDuan, W.$$b1
001024207 7001_ $$0P:(DE-Juel1)130263$$aLambertz, A.$$b2
001024207 7001_ $$0P:(DE-Juel1)130219$$aBittkau, K.$$b3
001024207 7001_ $$0P:(DE-Juel1)170055$$aLauterbach, V.$$b4
001024207 7001_ $$0P:(DE-Juel1)130233$$aDing, K.$$b5
001024207 7001_ $$aRau, U.$$b6
001024207 7001_ $$0P:(DE-Juel1)130268$$aMerdzhanova, T.$$b7
001024207 7001_ $$0P:(DE-Juel1)130212$$aAstakhov, O.$$b8
001024207 773__ $$0PERI:(DE-600)2012677-3$$a10.1016/j.solmat.2024.112813$$gVol. 270, p. 112813 -$$p112813 -$$tSolar energy materials & solar cells$$v270$$x0927-0248$$y2024
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