TY - JOUR
T1 - Photoelectrochemical characterization of n-type and p-type thin-film nanocrystalline Cu2ZnSnSe4 photocathodes
AU - Lee, Pay Yu
AU - Chang, Sheng Po
AU - Chang, Shoou Jinn
N1 - Funding Information:
The authors would like to thank the National Science Council and the Bureau of Energy, Ministry of Economic Affairs , Taiwan, for financial support (contract No. MOST 103-2221-E-006-098 and 102-E0603) and the LED Lighting Research Center, National Cheng Kung University, for assistance with device characterization. This work was also supported in part by the Center for Frontier Materials and Micro/Nano Science and Technology, National Cheng Kung University, Taiwan, as well as by the Advanced Optoelectronic Technology Center, National Cheng Kung University, through projects supported by the Ministry of Education, Taiwan.
Publisher Copyright:
© 2014 Elsevier Ltd. All rights reserved.
PY - 2015/3
Y1 - 2015/3
N2 - Copper-zinc-tin-selenide (Cu2ZnSnSe4, CZTSe) nanocrystals that do not contain any toxic elements and are 20-25 nm in size are synthesized through a process involving reactions of the elemental sources in a polyetheramine solution. By controlling the Zn/Sn ratio, both n-type and p-type CZTSe nanocrystals could be synthesized. The photoelectrochemical (PEC) properties of electrodes formed using inks containing n-type and p-type CZTSe nanocrystals are compared. An aqueous solution of NaCl is used as the electrolyte. A PEC cell based on an n-type CZTSe photoanode exhibits an efficiency, ηc, of 2.81%, while a p-type cell exhibits ηc of 0.42%. The flat band potentials of the n-type and p-type CZTSe photoanodes in 1 M NaCl are -0.55 and 0.48 V, respectively. Finally, the net carrier concentrations of the n-type and p-type CZTSe photoanodes, calculated from their Mott-Schottky plots, are 3.38 × 1018 and 2.73 × 1018 cm-3, respectively.
AB - Copper-zinc-tin-selenide (Cu2ZnSnSe4, CZTSe) nanocrystals that do not contain any toxic elements and are 20-25 nm in size are synthesized through a process involving reactions of the elemental sources in a polyetheramine solution. By controlling the Zn/Sn ratio, both n-type and p-type CZTSe nanocrystals could be synthesized. The photoelectrochemical (PEC) properties of electrodes formed using inks containing n-type and p-type CZTSe nanocrystals are compared. An aqueous solution of NaCl is used as the electrolyte. A PEC cell based on an n-type CZTSe photoanode exhibits an efficiency, ηc, of 2.81%, while a p-type cell exhibits ηc of 0.42%. The flat band potentials of the n-type and p-type CZTSe photoanodes in 1 M NaCl are -0.55 and 0.48 V, respectively. Finally, the net carrier concentrations of the n-type and p-type CZTSe photoanodes, calculated from their Mott-Schottky plots, are 3.38 × 1018 and 2.73 × 1018 cm-3, respectively.
UR - http://www.scopus.com/inward/record.url?scp=84920410776&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84920410776&partnerID=8YFLogxK
U2 - 10.1016/j.jece.2014.11.018
DO - 10.1016/j.jece.2014.11.018
M3 - Article
AN - SCOPUS:84920410776
SN - 2213-3437
VL - 3
SP - 297
EP - 303
JO - Journal of Environmental Chemical Engineering
JF - Journal of Environmental Chemical Engineering
IS - 1
ER -