Progress in Materials Development for the Rapid Efficiency Advancement of Perovskite Solar Cells

Abstract

The efficiency of perovskite solar cells (PSCs) has undergone rapid advancement due to great progress in materials development over the past decade and is under extensive study. Despite the significant challenges (e.g., recombination and hysteresis), both the single‐junction and tandem cells have gradually approached the theoretical efficiency limit. Herein, an overview is given of how passivation and crystallization reduce recombination and thus improve the device performance; how the materials of dominant layers (hole transporting layer (HTL), electron transporting layer (ETL), and absorber layer) affect the quality and optoelectronic properties of single‐junction PSCs; and how the materials development contributes to rapid efficiency enhancement of perovskite/Si tandem devices with monolithic and mechanically stacked configurations. The interface optimization, novel materials development, mixture strategy, and bandgap tuning are reviewed and analyzed. This is a review of the major factors determining efficiency, and how further improvements can be made on the performance of PSCs.

Stable Perovskite Solar Cells Using Molecularly Engineered Functionalized Oligothiophenes as Low‐Cost Hole‐Transporting Materials

“…The voids formed in the TT-4D and QT-4D layers could be caused by the lower solubility of TT-4D and QT-4D in chlorobenzene. [59] Further, differential scanning calorimetry (DSC) analysis was carried out to ascertain the morphological feature of HTMs. All three HTMs did not show glass transition temperature (Figure S16, Supporting Information).…”

Solvent Engineering as a Vehicle for High Quality Thin Films of Perovskites and Their Device Fabrication

“…Significant advancement has been achieved in device performance and stability of PSCs both in conventional and inverted structures and with mesoscopic or planar architectures. [29][30][31][32][33] It is well-known that the quality of the perovskite thin film can considerably influence the overall performance of the solar cells. Deposition of a uniform light harvesting perovskite layer with high phase purity, low structural defects, good morphology, and high crystallinity is always necessary to attain a high efficiency perovskite device.…”

Reality or fantasy—Perovskite semiconductor laser diodes

“…Moreover, the direct bandgap behavior with strong band edge absorption guarantees their excellent optical properties 12 . Hence, the use of halide perovskites has led to the fabrication of high‐performance solar cells, 13,14 photodetectors, 15 and light‐emitting diodes (LEDs) 16 . On the other hand, it is noted that the cations of perovskites can be replaced by other organic or inorganic cations to tune the bandgap energy through the change of lattice constants 17 .…”