Architecture for efficient monolithic bifacial perovskite-CdSeTe tandem thin film solar cells and modules
An optoelectronic device comprising two photovoltaic absorber materials of CdSeTe and perovskite and their functional component layers that are monolithically integrated into a bifacial tandem solar cell structure.
1. A method of preparing a bifacial Perovskite-CdSeTe tandem solar cell comprising in the following order:
preparing a transparent conducting oxide (TCO) electrode coated glass substrate;
depositing an n-type window layer;
depositing a CdSeTe absorber layer;
forming a back buffer surface passivation layer, the n-type window layer, the CdSeTe absorber layer and the back buffer surface passivation layer forming a CdSeTe subcell;
depositing an interconnecting layer;
depositing an electron transport layer (ETL);
depositing a perovskite absorber layer;
depositing a hole transport layer (HTL), the electron transport layer (ETL), the perovskite absorber layer, and the hole transport layer (HTL) forming a perovskite subcell;
depositing a front TCO layer;
depositing a front metal grid; and
forming the bifacial Perovskite-CdSeTe tandem solar cell.