Abstract
It is crucial to find a good material as a hole transport layer (HTL) to improve the performance of perovskite solar cells (PSCs), devices with an inverted structure. Polyethylene dioxythiophene-poly (styrene sulfonate) (PEDOT:PSS) and inorganic nickel oxide (NiOx) have become hotspots in the study of hole transport materials in PSCs on account of their excellent properties. In our research, NiOx and PEDOT: PSS, two kinds of hole transport materials, were prepared and compared to study the impact of the bottom layer on the light absorption and morphology of perovskite layer. By the way, some experimental parameters are simulated by wx Analysis of Microelectronic and Photonic Structures (wxAMPS). In addition, thin interfacial layers with deep capture levels and high capture cross sections were inserted to simulate the degradation of the interface between light absorption layer and PEDOT:PSS. This work realizes the combination of experiment and simulation. Exploring the mechanism of the influence of functional layer parameters plays a vital part in the performance of devices by establishing the system design. It can be found that the perovskite film growing on NiOx has a stronger light absorption capacity, which makes the best open-circuit voltage of 0.98 V, short-circuit current density of 24.55 mA/cm2, and power conversion efficiency of 20.01%.
Highlights
For the past few years, the enhancement of perovskite solar cells (PSCs) in device performance has benefited from a large number of experimental and theoretical studies, which are aimed at the structure of devices and selection of materials [1,2,3,4,5,6,7,8,9]
In the fabrication of PSCs, the photophysical properties and morphology of the light absorption layer are critical factors affecting the performance of the entire device [10,11,12,13,14,15,16,17,18,19]
The absorption spectra of perovskite layers trometer (Avantes, Apeldoom, The Netherlands), and the photoluminescence spectra onto different substrates were analyzed by an ultraviolet (UV) visible absorption specwere examined by a LabRAW HR800 PL testing system (HORIBA Jobin Yvon, Paris, trometer (Avantes, Apeldoom, The Netherlands), and the photoluminescence spectra were examined by a LabRAW HR800 PL testing system (HORIBA Jobin Yvon, Paris, France)
Summary
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. The bottom substrate will affect the perovskite film quality regardless of perovskite composition and preparing process [20,21] Owing to their low hysteresis, inverted PSCs have attracted much attention, in which the selection of hole transport layer (HTL) is even more significant [22,23]. A thin film with a high defect density and capture cross section was inserted between the perovskite films and HTL to characterize interface deterioration, improving the reliability of the simulation In our design, this new method of combining experiment and simulation was used to explore device property. Almost no reports have been found that compare the performance of different hole transport layers through the combination of experiment and simulation as we have This method is of great significance for research into PSCs
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