CPC H10K 30/57 (2023.02) [H01L 31/022433 (2013.01); H01L 31/022441 (2013.01); H01L 31/0475 (2014.12); H01L 31/078 (2013.01)] | 12 Claims |
1. A three terminal tandem solar generation unit comprising:
a first absorbing layer made of a compound having a perovskite type crystalline structure and comprising a front side and a back side,
a second absorbing layer comprising a front side and a back side,
a first and a second interdigitated front contacts arranged on the front side of the first absorbing layer, the first front contact having a first polarity and the second front contact having a second polarity,
a back contact having the first or the second polarity arranged on the back side of the second absorbing layer,
an interface layer arranged between the first and the second absorbing layers comprising a first semiconductor sub-layer doped according to the first polarity and a second sub-layer doped according to the second polarity and configured for enabling carriers associated with a polarity different than the polarity of the back contact to be transferred from the second absorbing layer to the first absorbing layer to be collected by the first front contact or second front contact having a polarity different than the polarity of the back contact,
wherein the first polarity corresponds to the p-type polarity having holes as associated carriers and the second polarity corresponds to the n-type polarity having electrons as associated carriers; and
wherein the back contact has the first polarity and comprises a back surface field and the second absorbing layer is doped according to the first polarity.
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