A theoretical study for high-performance inverted p-i-n architecture perovskite solar cells with cuprous iodide as hole transport material

Abstract

Inverted perovskite solar cells (p-i-n PSCs) have been fascinated due to rapid progress of performance in recent years. PEDOT: PSS is commonly used hole transport material (HTM) in p-i-n PSCs which is hygroscopic and acidic in nature that leads towards poor performance of device thus hinders commercialization of PSCs. Therefore, it is necessary to replace PEDOT: PSS with stable HTM in p-i-n PSCs. In this paper, theoretical study is carried out to investigate various physical parameters that can affect the performance of p-i-n PSCs with copper iodide (CuI) as HTM and phenyl-C61-butyric acid methyl ester (PCBM) as ETM. These parameters include the effect of doping density of ETM, absorber, and HTM as well as defect density and thickness of absorber on the performance of p-i-n PSCs. In addition, hole mobility and thickness of HTM is also investigated. It is found that performance of p-i-n PSC is strongly dependent on defect density and thickness of absorber layer while other physical parameters have minor influence on the performance of device. Upon final optimization, device attains PCE of more than 21 % which is encouraging. These results show that CuI as HTM is a potential choice for p-i-n PSCs.

Impact of absorber layer thickness, defect density, and operating temperature on the performance of MAPbI3 solar cells based on ZnO electron transporting material

“…Haider et al. [ 13 ] published a theoretical study of the impact of defect density, absorber thickness, doping concentration, hole mobility, and thickness of HTM on the physical parameters of the MAPbI 3 based PSC and achieved a PCE of 21.06%. Kang et al.…”

Sinc and discrete singular convolution for analysis of three‐layer composite of perovskite solar cell

“…Composite solar cell model consists of perovskite absorber layer (CH 3 NH 3 PbI 3 ), electron transport layer (TiO 2 or PCBM), and hole transport layer (Spiro-OMeTAD or CuI), 3,[32][33][34][36][37][38][39] which is illustrated in Figure 1. The governing equations for this model depend on each layer in this model as follows:…”

“…The diffusion and drift equations for this layer can be expressed as 3,[32][33][34][36][37][38][39] :…”

“…where D H perovskite , D E perovskite , and D I are the hole, electron, and ion vacancy diffusion coefficients, respectively, of perovskite material and V T is the thermal voltage. ϕ is the electrostatic potential calculated by Poisson equation, which can be defined as follows 3,[32][33][34][36][37][38][39] :…”

“…Correa-Baena et al 31 replaced the material of ETL from Tio 2 to SnO 2 to enhance the performance by reducing the hysteresis. Haider et al 32 offered a theoretical analysis of the impact of HTL thickness on the PSC parameters and achieved an efficiency of 21.06%.…”