Photosynthesis in nature does not use the far infrared part of the solar spectrum (λ > 900 nm), comprising about 30% of the incoming solar energy. By simple thermodynamic arguments it is explained that this is due to the unavoidable back reactions during the night. It follows that λ ≈ 900 nm provides a natural limit on artificial photosynthesis. The same limit holds for a two-tandem Si solar cell.

We report on results of tandem amorphous/microcrystalline (a-Si:H/μc-Si:H) silicon solar cells developed in commercial Oerlikon Solar KAI PECVD reactors, at an excitation frequency of 40.68 MHz. The cell structure consists of a stack of glass/front contact/pin a-Si:H/intermediate reflector/pin μc-Si:H/back contact. LPCVD (low-pressure chemical vapor deposition) ZnO (zinc oxide) is applied as fr...

Perovskite-on-silicon tandem solar cells show potential to reach > 30% conversion efficiency, but require careful optical control. We introduce here an effective light-management scheme based on the established pyramidal texturing of crystalline silicon cells. Calculations show that conformal deposition of a thin film perovskite solar cell directly onto the textured front surface of a high effi...

To realize the high efficiency potential of perovskite/chalcopyrite tandem solar cells in modules, hydrogenated In2O3 (IO:H) as electrode is investigated. IO:H with an electron mobility of 100 cm 2 ·V -1 ·s -1 is demonstrated. Compared to the conventional Sn doped In2O3 (ITO), IO:H exhibits a decreased electron concentration and leads to almost no subbandgap absorption up to the wavelength of 1...

Perovskite Solar Cells In article number 2202438, Cong Chen, Dewei Zhao, Fan Fu, and co-workers report 15.1% flexible near-infrared transparent wide-bandgap (1.77 eV) perovskite solar cells with a low open-circuit voltage–deficit of 480 mV. When paired flexible, narrow-bandgap (1.24 cells, they demonstrate 23.8% all-perovskite tandem cell superior voltage 2.1 V.

The polymer solar cells also known as organic (OSCs) have drawn attention due to their cynosure in industrial manufacturing because of promising properties such low weight, highly flexible, and low-cost production. However, η restricts the utilization OSCs for potential applications energy harvesting devices. In this paper, structure based on a triple-junction tandem scheme is reported with thr...