Multilayer conformal structural perovskite solar cells design for light trapping enhancement

作者：Tu, Yiteng; Tan, Xinyu^*

来源：Optik, 2023, 279: 170783.

DOI：10.1016/j.ijleo.2023.170783

• Perovskite solar cells
• Multilayer conformal structure
• Light trapping enhancement
• Finite-difference time-domain simulation
• Thin film

Thin film perovskite solar cells (PSCs) have insufficient light utilization due to thickness limita-tion. Structural design of thin film PSCs can effectively enhance the property of light trapping and thereby improve the photocurrent density. In this work, both the thickness of perovskite layer and front Indium Tin Oxides (ITO) layer for classical PSCs was firstly optimized. 22.4% of light ab-sorption enhancement can be achieved. Then, we proposed four different types of multilayer conformal structures PSCs consisting of hemisphere, cylinder, inverted pyramid and cone struc-tures. Compared with the planner PSCs, the optimized hemispherical multilayer conformal structure (HMCS) PSCs can further enhance the light absorption by 12.3% and obtain the highest photocurrent density of 23.82 mA/cm  2. The photonic interaction between the structure and incident wavelength is examined and discussed. The presented method and multilayer conformal structures can be used to design the light absorption enhancement for a variety of PSCs.