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← ScienceWhich mechanism limits maximum current density across silicon heterojunction solar cell interfaces with surface passivation layers?
A)Recombination due to dangling bonds✓
B)Ohmic losses in transparent conductive oxides
C)Contact resistance from tunnel barriers
D)Photon absorption within interfacial layers
💡 Explanation
When recombination at the interface occurs, dangling bonds act as trap states decreasing carrier lifetime because carriers prematurely combine, leading to reduces the overall efficiency reducing the current. Therefore recombination is the limiting mechanisms, rather than ohmic or absorptive effects which require larger layer thicknesses/conductivity issues.
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