Semitransparent Printable Mesoscopic Perovskite Solar Cells for Tandem Solar Cells

Abstract

The boosting efficiency of perovskite solar cells (PSCs) has evoked the interest in applying them in tandem structures, especially perovskite/silicon tandem solar cells. However, the tandem solar cells still face concerns about stability, upscaling, and cost‐effectiveness on the path to commercialization. Herein, an innovative tandem architecture based on the printable mesoscopic perovskite solar cells is proposed. By investigating the effects of indium tin oxide (ITO) particle size, annealing temperature, and dispersant on the performance of ITO mesoporous films, screen‐printable mesoscopic ITO electrode with an electron mobility of 7.5 cm2 V−1 s−1 and an average visible transmittance of over 80% is successfully obtained. The screen‐printed mesoporous titania, zirconia, and ITO are used as a scaffold and a semitransparent PSC with a champion power conversion efficiency of 9.38% is fabricated infiltrated with perovskites. Further, a perovskite/silicon tandem device which can remain stable for >720 h is demonstrated, highlighting the potential of screen‐printed inorganic scaffold structure in tandem photovoltaic technique.

Screen‐Printing Technology for Scale Manufacturing of Perovskite Solar Cells

“…[197][198][199][200][201] For the interface of transparent back electrode, Ye et al modified ITO paste by mixing ITO powder, ethyl cellulose, and terpineol, which was used to screen-print the back ITO electrode. [202] The authors screen-printed TiO 2 , ZrO 2, and ITO layer by layer to prepare an all-inorganic mesoporous scaffold. By optimizing the mesoporous particle size, dispersant, and annealing temperature, mesoporous ITO (m-ITO) films with mobility of 7.5 cm 2 V −1 s −1 and visible light transmittance (AVT) of over 80% were prepared.…”

Brief Outlook on Top Cell Absorber of Silicon‐Based Tandem Solar Cells

“…For higher current, a thicker absorber layer is required, which limits the carrier collection of the wide bandgap, thereby reducing the PCE. [67][68][69] Furthermore, the formation of a photoinduced lower-energy phase reduces iQY, which directly affects the V OC . After many years of research, the highest V OC for perovskite cells is 1.31 with 1.72 eV wide bandgap, which is still 410 meV V OC loss, while this loss is 310 meV in narrow-bandgap perovskite.…”

Revealing the Role of Band Offsets on the Charge Carrier Dynamics of CsSn0.5Ge0.5I3‐Based Perovskite Solar Cell: A Theoretical Study

“…However, the fact that it requires an expensive manufacturing process and poses limited efficiency (21-22%) compels us to find a promising alternative. [2][3][4] The advancements in technology are assisting in the reduction of production costs but the efficiency improvement witnessed in the past few years is not very appreciable. This has led to a shift in the interest of the researchers toward different PV materials exhibiting better optoelectronic properties.…”