Comprehensive design of omnidirectional high-performance perovskite solar cells.

Yutao Zhang,Yimin Xuan

doi:10.1038/srep29705

Abstract

The comprehensive design approach is established with coupled optical-electrical simulation for perovskite-based solar cell, which emerged as one of the most promising competitors to silicon solar cell for its low-cost fabrication and high PCE. The selection of structured surface, effect of geometry parameters, incident angle-dependence and polarization-sensitivity are considered in the simulation. The optical modeling is performed via the finite-difference time-domain method whilst the electrical properties are obtained by solving the coupled nonlinear equations of Poisson, continuity, and drift-diffusion equations. The optical and electrical performances of five different structured surfaces are compared to select a best structured surface for perovskite solar cell. The effects of the geometry parameters on the optical and electrical properties of the perovskite cell are analyzed. The results indicate that the light harvesting is obviously enhanced by the structured surface. The electrical performance can be remarkably improved due to the enhanced light harvesting of the designed best structured surface. The angle-dependence for s- and p-polarizations is investigated. The structured surface exhibits omnidirectional behavior and favorable polarization-insensitive feature within a wide incident angle range. Such a comprehensive design approach can highlight the potential of perovskite cell for power conversion in the full daylight.

Highlights

The comprehensive design approach is established with coupled optical-electrical simulation for perovskite-based solar cell, which emerged as one of the most promising competitors to silicon solar cell for its low-cost fabrication and high power conversion efficiency (PCE)
Plenty of efforts have been devoted to the investigation of the solar cell to increase the power conversion efficiency (PCE) and reduce the cost of the solar cell[3,4,5,6]
It was found that the short-circuit photocurrent density of 15.6 mA/cm[2], open-circuit voltage (Voc) of 955 mV and fill factor (FF) of 0.63, which lead to a PCE of 9.4%, are realized by such a perovskite solar cell

Summary

Introduction

The comprehensive design approach is established with coupled optical-electrical simulation for perovskite-based solar cell, which emerged as one of the most promising competitors to silicon solar cell for its low-cost fabrication and high PCE. The structured surface exhibits omnidirectional behavior and favorable polarization-insensitive feature within a wide incident angle range Such a comprehensive design approach can highlight the potential of perovskite cell for power conversion in the full daylight. The energy conversion efficiency of the solid-state perovskite solar cells has quickly surpassed that of the conventional dye-sensitized solar cells and attracted more and more attentions[9]. Because of the excellent solar-to-electricity energy conversion performance of CH3NH3PbI3 material, it is applied to the photovoltaic cell and has attracted great attentions. Bach et al developed the perovskite cell by replacing the liquid-electrolyte with solid-state hole-transport material (HTM) 2,2′,7,7′tetrakis (N,N-di-p-methoxyphenyl-amine) 9,9′–spirobifluorene (OMeTAD) and the cell performance is obviously improved[16]. There is little investigation concerning the effect of micro-structure on the optical and electrical performances of perovskite solar cells

Methods

Results

Conclusion