TY - JOUR
T1 - Effects of transition metal dichalcogenide molybdenum disulfide layer formation in copper-zinc-tin-sulfur solar cells from numerical analysis
AU - Chelvanathan, Puvaneswaran
AU - Hossain, Mohammad Istiaque
AU - Husna, Jamilah
AU - Alghoul, Mohammad
AU - Sopian, Kamaruzzaman
AU - Amin, Nowshad
PY - 2012/10
Y1 - 2012/10
N2 - This study demonstrates the effects of transition metal dichalcogenide, MoS 2 layer formation in between the copper-zinc-tin-sulphide (CZTS) absorber layer and Mo back contact from theoretical study and numerical modeling. The objective of this study is to elucidate the effects of n or p type MoS 2 on the overall CZTS solar cell performance. Energy band line-up of Mo/MoS 2/CZTS interface is analyzed to elucidate the interface properties. It is found out that p-MoS 2 layer in CZTS solar cell induces the same adventitious effect as p-MoSe 2 in CIGS solar cell. However, n-MoS 2 layer has detrimental effect on the CZTS solar cell by creating an additional back contact diode with p-CZTS layer and an ohmic contact with Mo layer. Thickness, bandgap energy and carrier concentration of n-MoS 2 all have been varied in the numerical simulation to observe its effects on the cell performance parameters. The results from numerical simulation show that MoS 2 layer as thin as 50nm is sufficient enough to induce adverse effect on the solar cell performance. This could be caused by the increase in series resistance of the solar cell as n-type MoS 2 would inhibit hole current into Mo back contact due to the hole barrier between n-type MoS 2 and Mo back contact. The increase in MoS 2 bandgap and carrier concentration also results in detrimental effect to the performance of the cell mainly due to the possibility of electrons to drift towards the back contact and recombine.
AB - This study demonstrates the effects of transition metal dichalcogenide, MoS 2 layer formation in between the copper-zinc-tin-sulphide (CZTS) absorber layer and Mo back contact from theoretical study and numerical modeling. The objective of this study is to elucidate the effects of n or p type MoS 2 on the overall CZTS solar cell performance. Energy band line-up of Mo/MoS 2/CZTS interface is analyzed to elucidate the interface properties. It is found out that p-MoS 2 layer in CZTS solar cell induces the same adventitious effect as p-MoSe 2 in CIGS solar cell. However, n-MoS 2 layer has detrimental effect on the CZTS solar cell by creating an additional back contact diode with p-CZTS layer and an ohmic contact with Mo layer. Thickness, bandgap energy and carrier concentration of n-MoS 2 all have been varied in the numerical simulation to observe its effects on the cell performance parameters. The results from numerical simulation show that MoS 2 layer as thin as 50nm is sufficient enough to induce adverse effect on the solar cell performance. This could be caused by the increase in series resistance of the solar cell as n-type MoS 2 would inhibit hole current into Mo back contact due to the hole barrier between n-type MoS 2 and Mo back contact. The increase in MoS 2 bandgap and carrier concentration also results in detrimental effect to the performance of the cell mainly due to the possibility of electrons to drift towards the back contact and recombine.
UR - https://www.scopus.com/pages/publications/84869113712
U2 - 10.1143/JJAP.51.10NC32
DO - 10.1143/JJAP.51.10NC32
M3 - Article
AN - SCOPUS:84869113712
SN - 0021-4922
VL - 51
JO - Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
JF - Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
IS - 10 PART 2
M1 - 10NC32
ER -