Analysis of various hole transport layers (HTLs) on the performance of CZTS- solar cell

Abstract

CZTS is a potential absorber material and received a lot of focus because of its excellent optoelectronic properties. To improve the functionality of CZTS-based solar cells, this study examines the potential HTLs (MoTe2, Cu2O, and SnS) and their contribution to the better performance of the device. HTL improves the overall performance of the device by decreasing the recombination rate at the back contact and photon energy absorption. The impact of the various device parameters such as absorber layer thickness, defect densities, contact work functions, shunt and series resistances (RSh and Rs), and the temperature of the device are briefly examined in this work. The research shows that Cu2O and SnS are more emerged HTLs rather than MoTe2. The device achieved a PCE of 23 % and a FF of 74 %. The results show that the addition of these HTLs significantly improved the Voc, Jsc, and FF, all of which are within the Shockley-Queasier limits. This study points to the possibility of producing more efficient CZTS heterojunction-based solar cells.

Simulation and numerical modeling of high‐efficiency CZTS solar cells with a BSF layer

“…In this subsection, variation in temperature from 300 to 400 K have been done and studied accordingly 3 . All the simulated J – V curve and PV parameters are obtained as given in Figure 6A,B, respectively.…”

“…In this subsection, variation in temperature from 300 to 400 K have been done and studied accordingly. 3 All the simulated J-V curve and PV parameters are obtained as given in Figure 6A,B, respectively. As depicted in Figure 6 which shows that while increasing the temperature from 300 to 400 K, all the PV parameters tends to decrease in both BSF and without BSF cases.…”

“…SCAPS-1D tool is widely used for the numerical modeling of scs. 25,26 In this work, the numerical modeling of a CZTS device with a BSF layer is modeled and investigated. SCAPS-1D tool used to solve the Poisson and continuity equations for electrons and holes in the device under different bias conditions as depicted in Equations (1) 27,28 :…”

“…Due to their excellent optical and electronic properties, an abundance of constituent elements, and low toxicity copper–zinc–tin–sulfur (CZTS) solar cells have been considered a promising contender for the next‐generation thin‐film photovoltaic (PV) technology 1–3 . CZTS is a quaternary compound semiconductor consisting of copper, zinc, tin, and sulfur, and it has a direct bandgap suitable for efficient solar energy conversion 4,5 .…”

Improving the efficiency of ZnO/WS2/CZTS1 solar cells using CZTS2 as BSF layer by SCAPS-1D numerical simulation

“…Back contact metal-work function and its impact on the device In this study, the work function of the back contact is tuned from 5 eV to 5.7 eV[21][22][23][24][25] and the corresponding cell performance is presented in figure 9. From the figure, it is evident that the efficiency increases with an increase in the back contact metal work function.…”