Revealing the output power potential of bifacial monolithic all-perovskite tandem solar cells

Abstract

Bifacial monolithic all-perovskite tandem solar cells have the promise of delivering higher output power density by inheriting the advantages of both tandem and bifacial architectures simultaneously. Herein, we demonstrate, for the first time, the bifacial monolithic all-perovskite tandem solar cells and reveal their output power potential. The bifacial tandems are realized by replacing the rear metal electrodes of monofacial tandems with transparent conduction oxide electrodes. Bandgap engineering is deployed to achieve current matching under various rear illumination conditions. The bifacial tandems show a high output power density of 28.51 mW cm−2 under a realistic rear illumination (30 mW cm− 2). Further energy yield calculation shows substantial energy yield gain for bifacial tandems compared with the monofacial tandems under various ground albedo for different climatic conditions. This work provides a new device architecture for higher output power for all-perovskite tandem solar cells under real-world conditions.

In-situ growth of low-dimensional perovskite-based insular nanocrystals for highly efficient light emitting diodes

“…The regulation of perovskite growth significantly prompts the performance enhancement of perovskite-based optoelectronic devices 1 – 3 . In recent years, benefits from the development of advanced thin-film processing techniques, such as compositional engineering, morphology control, dimensionality manipulation, and surface passivation, the efficiency of perovskite light-emitting diodes develop significantly, and it generates tremendous interest due to its high color purity, high brightness, facile bandgap tunability, and compatibility with low-cost manufacturing technology 4 – 7 .…”

Prospects for Tin-Containing Halide Perovskite Photovoltaics

“…This could be realized by increasing the thickness of the films, reducing the parasitic absorption of the interconnecting layer, or introducing reflective or light-trapping nanostructures at the back contact to increase photon absorption. Alternatively, this may include consideration of bifacial all-perovskite tandem solar cells with transparent back contacts. ,, As well as harvesting additional albedo intensity to increase the energy yield, this could also decrease the optimal band gap of the wide gap junction. This would also reduce the necessary incorporation of Br – ions at the X-site for the wide gap material, making higher efficiencies and stability easier to achieve, together with reduced halide segregation and interfacial losses.…”

“…Alternatively, this may include consideration of bifacial all-perovskite tandem solar cells with transparent back contacts. 62 , 181 , 182 As well as harvesting additional albedo intensity to increase the energy yield, this could also decrease the optimal band gap of the wide gap junction. This would also reduce the necessary incorporation of Br – ions at the X-site for the wide gap material, making higher efficiencies and stability easier to achieve, together with reduced halide segregation and interfacial losses.…”

Enhanced Photon Harvesting in Wedge Tandem Solar Cell

“…[27] Additionally, few studies have focused on tandem solutions of all perovskites. [28] Several studies have addressed perovskite solar cells' electronic [29][30][31][32] and optical properties [33][34][35] for the purpose of understanding and optimizing conversion efficiency and photon management in the perovskite solar cell. [36,37] A high extinction coefficient and a large diffusion length of perovskite make them suitable materials for solar cells with a large short-circuit current density and high energy conversion efficiency.…”