Hamideh Talebi,Farzin Emami,Esmat Rafiee.Broadband absorption enhancement in hole-transport- layer-free perovskite solar cell by grating structure[J].Optoelectronics Letters,2023,(10):587-592 Broadband absorption enhancement in hole-transport- layer-free perovskite solar cell by grating structure Author Name Affiliation Hamideh Talebi  Nano?Optoelectronic Research Center, Electronic Department, Shiraz University of Technology, Shiraz, Iran  Farzin Emami  Nano?Optoelectronic Research Center, Electronic Department, Shiraz University of Technology, Shiraz, Iran  Esmat Rafiee  Department of Electrical Engineering, Faculty of Engineering, Alzahra University, Tehran, Iran  Abstract:       Recently, the hole transport layer-free planar perovskite solar cells (HTL-free PSCs) have attracted intense attention. However, the poor absorption of light in the wavelengths longer than 800 nm is an important challenge in all configurations of PSCs. In this study, the HTL-free PSC with a gold rectangular grating at back contact is proposed. In order to improve the performance of the solar cell, effects of grating dimensions and periodicity on the absorption of the active layer are numerically investigated. In the improved condition, an absorption enhancement of 25% in the range of 300—1 400 nm is obtained compared with the flat electrode-based structure. These improvements are attributed to the coupling of light to surface plasmon polariton (SPP) modes. Also, the electrical simulation results of the improved solar cell demonstrated short-circuit current density and power conversion efficiency of 27.72 mA/cm2 and 18%, respectively. Hits: 180 Download times: 0 View Full Text    Download reader