Perovskite-silicon tandem structure and photon upconverters
AssigneeKing Fahd University of Petroleum and Minerals
InventorFiroz Khan
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Abstract
A perovskite-silicon tandem cell capable of absorbing solar radiation with energy lower than that of 1.12 eV, i.e., the bandgap of crystalline silicon—corresponding to the wavelength of 1100 nm. Ho3+ can absorb photons of wavelength range 1120 to 1190 nm, Tm3+, 1190 to 1260 nm, and Er3+, 1145 to 1580 nm, but up-conversion can be achieved using Ho3+, Tm3+, and Er3+-doped metal oxide, such as ZrO2, in perovskite-silicon tandem solar cells. Doped metal oxides, such as ZrO2 can also work as selective contacts. Such perovskite-silicon tandem structures can achieve over 30% solar energy conversion efficiency.
Claims17
A tandem photovoltaic cell comprising, in an order as follows:
- an anti-reflection layer;
- a transparent conductive oxide layer;
- a hole transport layer;
- a perovskite layer;
- a p+-doped porous silicon electron transport layer;
- an n-type silicon layer;
- an n+-doped silicon layer as a homojunction with the n-type silicon layer;
- a hole blocking and/or silicon-passivating layer;
- a metal oxide layer doped with Ho3+, Tm3+, and/or Er3+;
- and
- a conductive electrode layer.
Dependencies are inferred from the claim text.