Highly efficient monolithic perovskite silicon tandem solar cells: analyzing the influence of current mismatch on device performance

Abstract

We present a highly efficient monolithic perovskite/silicon tandem solar cell and analyze the tandem performance as a function of photocurrent mismatch with important implications for future device and energy yield optimizations.

Conformal monolayer contacts with lossless interfaces for perovskite single junction and monolithic tandem solar cells

“…14 Although highest reported power conversion efficiencies (PCEs) of over 23% are demonstrated for PSCs with the ''regular'' n-i-p device architecture, 15 the p-i-n (so called ''inverted'') architecture is gaining increasing popularity due to its ease of processing and superior suitability for perovskitebased tandem solar cells. [16][17][18][19] Moreover, p-i-n PSCs carry the promise of low-temperature fabrication, high stability 20 without the use of dopants that cause degradation, [21][22][23] low currentvoltage hysteresis 24 and compatibility to flexible substrates. 25,26 However, compared to their n-i-p single junction counterparts, p-i-n PSCs still lack behind in maximum power-conversion efficiency.…”

Managing Phase Purities and Crystal Orientation for High‐Performance and Photostable Cesium Lead Halide Perovskite Solar Cells

“…As such, we investigated perovskite solar cells with x = 1.2, 1.5, and 1.8; however, these halide compositions have an optical bandgap of over 1.93 eV, which significantly limits their light‐harvesting capability and results in devices with low photocurrent and power conversion efficiency (PCE). For a two‐junction tandem cell, with a crystalline silicon or Cu(In, Ga)Se 2 thin film that has a bandgap no wider than 1.2 eV as the bottom cell, a top cell with a bandgap in the range of 1.7–1.8 eV is required to provide an optimal short‐circuit photocurrent density ( J sc ) of over 18 mA cm −2 , to match that of the bottom cell. For all‐perovskite tandem cells, the wide‐bandgap layer could be up to 1.9 eV, because the narrow bandgap perovskite with metal alloying of lead and tin has a minimum bandgap beyond 1.2 eV .…”

Transparent Electrodes Consisting of a Surface‐Treated Buffer Layer Based on Tungsten Oxide for Semitransparent Perovskite Solar Cells and Four‐Terminal Tandem Applications

“…To date, the highest efficiencies reported for four‐terminal and two‐terminal silicon‐perovskite tandem solar cells are 27.1% and 29.2% (26.0% in literature), respectively. [ 2,22,23 ] Advantages of the mechanically stacked four‐terminal tandem configuration include the two cells required to be only optically coupled, eliminating the necessity of current or voltage matching, and thus, allowing independent development of the silicon and PSCs. [ 24 ]…”