Elucidating Charge Carrier Dynamics in Perovskite‐Based Tandem Solar Cells

Abstract

Recently, multijunction tandem solar cells (TSCs) have presented high power conversion efficiency and revealed their immense potential in photovoltaic evolution. It is demonstrated that multiple light absorbers with various bandgap energies overcome the Shockley–Queisser limit of single‐junction solar cells by absorbing the wide‐range wavelength photons. Here, the main key challenges are reviewed, especially the charge carrier dynamics in perovskite‐based 2‐terminal (2‐T) TSCs in terms of current matching, and how to manage these issues from a vantage point of characterization. To do this, the effect of recombination layers, optical and fabrication hurdles, and the impact of wide bandgap perovskite solar cells are discussed extensively. Afterward, this review focuses on various optoelectronics, spectroscopic, and theoretical (optical simulation) characterizations to figure out those issues, especially current‐matching issues faced by the photovoltaic society. This review comprehensively provides deep insights into the relationship between the current‐matching problems and the photovoltaic performance of TSCs through a variety of perspectives. Consequently, it is believed that this review is essential to address the main problems of 2‐T TSCs, and the suggestions to elucidate the charge carrier dynamics and its characterization may pave the way to overcome such obstacles to further improve the development of 2‐T TSCs in relation to the current‐matching problems.

Molecular Engineering of Anthracene Core-Based Hole-Transporting Materials for Organic and Perovskite Photovoltaics

“…High LHE values help to improve the short-circuit current of the devices and, thus, enhance the efficiency of the devices . Any optoelectronic material can generate charge carriers during the light-harvesting process. , It is also calculated using eq and is believed to be directly related to the J sc values of materials created following the fabrication of devices J sc = ∫ λ 0 L H E false( λ false) φ inj η collet normald λ …”

“… 71 Any optoelectronic material can generate charge carriers during the light-harvesting process. 65 , 72 It is also calculated using eq 5 and is believed to be directly related to the J sc values of materials created following the fabrication of devices 73 …”