Proposition and computational analysis of a kesterite/kesterite tandem solar cell with enhanced efficiency

Abstract

An all-kesterite tandem junction solar cell has been proposed and an efficiency ≥20% has been estimated from computational analysis.

Boosting the efficiency of single junction kesterite solar cell using Ag mixed Cu2ZnSnS4 active layer

“…Aluminum doped ZnO (AZO) is used to reduce the series resistance of the cell. 17 The thickness of AZO, ZnO, CdS(n), CZTS(p+) are 400, 50, 100, 200 nm, respectively. We varied the thickness of ACZTS(p) in this study to maximize the efficiency of our structure.…”

“…2 and Table 1 show the J-V characteristic and comparison between our simulation and experimental results, 8,15 respectively. The optical and basic electrical parameters as well as recombination parameters were taken from literature (optical; 20,21,[28][29][30] electrical 8,17,[19][20][21][22][23][24][31][32][33][34][35][36][37][38] (listed in Table 2)). In this respect, we have used minority carrier life time of CZTS 0.47 ns and 0.72 ns for matching with the experimental results of Shin et al 8 and Sun et al 15 respectively.…”

Multifunctional Copper‐Based Quaternary Chalcogenide Semiconductors Toward State‐of‐the‐Art Energy Applications

“…The computational analysis by Alam et al . shows that 21.74% efficiency could be achieved by their proposed eco‐friendly kesterite CZTS/CZTSe tendam solar devices design with optimized band gaps . However, many other quaternary analogues Cu 2 M I M II X 4 are still at the initial stages of development and their PV efficiencies are yet to be evaluated ,,,,,,.…”

Proposition of an Environment Friendly Triple Junction Solar Cell Based on Earth Abundant CBTSSe/CZTS/ACZTSe Materials

“…As a result, current density falls significantly with the higher thickness of CZTS (Figure 2(a)) because of the reduced optical power absorption in the bottom cell. Thus, higher thickness of [19] 7 [18] 8.5 [17] 7 [16] Band gap (eV) 1.9 [14] 1.45 [18] 0.97 [17] 0.9 [16] Electron affinity (eV) 3.6 [19] 4.1 [24] 4.05 [17,25] 4.05 [13] Electron effective mass (m e /m o ) 0.37 [14,15] 0.18 [13,16] 0.08 [17] 0.07 [13,16] Hole effective mass (m p /m o ) 1.68 [14] 2 [13,16] 0.3 [17] 0.2 [13,16] Electron mobility (cm 2 V À1 s À1 ) 3 0 [26] 40 [21,24] 75 [23] 145 [13,21] Hole mobility (cm 2 V À1 s À1 ) 1 0 [27] 25 [21] 1 [17,23] 35 [13,21] Acceptor concentration (cm…”

“…In a previous report, we have recently proposed a dual junction CZTS (top cell)/CZTSe (bottom cell) tandem solar cell with 19.87% efficiency. [13] Further improvements in this direction need suitable bandgap materials for efficient absorption and carrier generation. Recently, Shin et al [14] demonstrated a solar cell of 5.2% PCE with Cu 2 BaSnS 4Àx Se x (CBTSSe) whose bandgap can be in the range of %1.6-2.0 eV [15] making it suitable for the top cell of a triple junction chalcogenide solar cell.…”