The band gap of Cu2ZnSnSe4: Effect of order-disorder

By G. Rey, A. Redinger, Jan Sendler, T. Weiss, M. Thevenin, M. Guennou, B. E. Adib, S. Siebentritt. 2014

221 citations recorded by the source corpus.

The order-disorder transition in kesterite Cu2ZnSnSe4 (CZTSe), an interesting material for solar cell, has been investigated by spectrophotometry, photoluminescence (PL), and Raman spectroscopy. Like Cu2ZnSnS4, CZTSe is prone to disorder by Cu-Zn exchanges depending on temperature. Absorption measurements have been used to monitor the changes in band gap energy (Eg) of solar cell grade thin films as a function of the annealing temperature. We show that ordering can increase Eg by 110 meV as compared to fully disordered material. Kinetics simulations show that Eg can be used as an order parameter and the critical temperature for the CZTSe order-disorder transition is 200 ± 20 °C. On the one hand, ordering was found to increase the correlation length of the crystal. But on the other hand, except the change in Eg, ordering did not influence the PL signal of the CZTSe.

Subfields: Electrical and Electronic Engineering, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/af2cd90088c7410a7dd8243e19aee24a72bfa225

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In Electrical and Electronic Engineering

1. X. Hao
2. Martin A. Green
3. Fang-yang Liu
4. H. Cui
5. Yu Feng
6. G. Conibeer
7. Xiaolei Liu
8. David B. Mitzi

In Materials Chemistry

1. Martin A. Green
2. X. Hao
3. Fang-yang Liu
4. H. Cui
5. Yu Feng
6. G. Conibeer
7. Xiaolei Liu
8. O. Hansen

Citations in the corpus

• On the origin of band-tails in kesterite (2017, unknown): “200 °C for pure selenide kesterite (CZTSe) [36] or Se-rich CZTSSe [37] and 260 °C for pure sulphide [31,38].”
• The current status and future prospects of kesterite solar cells: a brief review (2016, methodology): “The order–disorder transition was found to be reversible by repeated annealing above and below Tc, and occurs at 260 ± 10 °C [71], 200 ± 20 °C [72] and 195 ± 5 °C [89] for reactively sputtered CZTS, co-evaporated CZTSe and solution-processed CZTSSe films, respectively (Figure 4).”
• What is the band alignment of Cu 2 ZnSn(S,Se) 4 solar cells? (2017, background): “11 eV in CZTSe [74] when the order param-”