Recent Advances in Wide-Bandgap Organic–Inorganic Halide Perovskite Solar Cells and Tandem Application

Abstract

Perovskite-based tandem solar cells have attracted increasing interest because of its great potential to surpass the Shockley–Queisser limit set for single-junction solar cells. In the tandem architectures, the wide-bandgap (WBG) perovskites act as the front absorber to offer higher open-circuit voltage (VOC) for reduced thermalization losses. Taking advantage of tunable bandgap of the perovskite materials, the WBG perovskites can be easily obtained by substituting halide iodine with bromine, and substituting organic ions FA and MA with Cs. To date, the most concerned issues for the WBG perovskite solar cells (PSCs) are huge VOC deficit and severe photo-induced phase separation. Reducing VOC loss and improving photostability of the WBG PSCs are crucial for further efficiency breakthrough. Recently, scientists have made great efforts to overcome these key issues with tremendous progresses. In this review, we first summarize the recent progress of WBG perovskites from the aspects of compositions, additives, charge transport layers, interfaces and preparation methods. The key factors affecting efficiency and stability are then carefully discussed, which would provide decent guidance to develop highly efficient and stable WBG PSCs for tandem application.

Versatile Self‐Assembled Molecule Enables High‐Efficiency Wide‐Bandgap Perovskite Solar Cells and Organic Solar Cells

“…[ 5 ] This makes them highly attractive for fabricating tandem solar cells (TSCs), which can overcome the Shockley–Queisser (S–Q) limit of single‐junction solar cells (33%) to achieve higher efficiency. [ 6,7 ] On the basis of theoreticalcalculation, two‐terminal perovskite/Si TSCs can deliver 45% efficiency, while all‐perovskite TSCs can approach 39%. [ 8 ] To reach these targets, it is urgent to develop highly efficient and stable wide‐bandgap (WBG) PSCs as top subcells in these tandem configurations.…”

Multifunctional molecule interface modification for high-performance inverted wide-bandgap perovskite cells and modules

“…[15][16][17][18][19][20] The poor PCEs resulted from the interfacial recombination in the poor top perovskite/ETL contact. [21][22][23][24] Since the WBG perovskites are composed of ionic salts, I − or Br − anion-related trap states can be easily generated on the surface under anneal process or aging [25][26][27][28][29] and these halide vacancies subsequently caused the interfacial defects and halide phase separation, resulting in the deteriorated performance of WBG PSCs. Thus, to demonstrate the feasibility of WBG p-i-n PSCs in tandem cell application, these major issues must be resolved.…”

Relationship between the Annealing Temperature and the Presence of PbI2 Platelets at the Surfaces of Slot-Die-Coated Triple-Halide Perovskite Thin Films

“…Triple-halide perovskites (THPs) 1 are applied as top-cell absorber layers in perovskite-silicon tandem solar cells (PSTSCs). Developed as a wide-band-gap semiconductor, 2 it can reach the optimum band-gap energy for PSTSC top cells of about 1.7 eV 3 without the efficiency-limiting, light-induced effect of halide phase segregation. 4,5 Recently, a record power conversion efficiency (PCE) for PSTSCs of 33.7% was achieved.…”