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Dive into the research topics where Pay-Yu Lee is active.

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Featured researches published by Pay-Yu Lee.


Journal of The Electrochemical Society | 2011

Rinsing Effects on Successive Ionic Layer Adsorption and Reaction Method for Deposition of ZnO Thin Films

Shih-Chang Shei; Shoou-Jinn Chang; Pay-Yu Lee

This study investigates different rinsing processes using a successive ionic layer adsorption and reaction (SILAR) method to deposit ZnO thin films. Rinsing in ultrasonic-assisted deionized (DI) water reveals thin films with better adsorptive attraction compared with a traditional SILAR method because the former can remove the loosely attached ZnO and unreacted Zn(OH) 2 grains. In this case, the ZnO films appear as large pellets and white particles with low transparency. The structure and transparency of ZnO thin films can be significantly improved by using ultrasonic irradiation and rinsing in ethylene glycol rather than rinsing in DI water. The obtained ZnO films exhibited were more smooth, compact, and diaphanous, and the transparencies of ZnO films reached as high as 90% in the visible-light wavelength region. Furthermore, when the rinsing temperature of ethylene glycol was increased from 95 to 125°C, the ZnO films appeared to have finer grain size, higher transparency, and lower oxygen vacancies. Mechanism analysis indicated that the ethylene glycol acts as a dispersing agent to reduce ZnO agglomeration and the higher rinsing temperature enhances the decomposition capability of Zn(OH) 2 .


IEEE Transactions on Nanotechnology | 2013

Synthesis of CZTSe Nanocrystal Prepared by a Facile Route in Coordinating Solvent From Elemental Sources

Shih-Chang Shei; Pay-Yu Lee

This paper reports the preparation of Cu2 ZnSnSe4 (CZTSe) nanocrystals from elemental sources through the application of various coordinating solvents. The CZTSe nanocrystals were synthesized by mixing metals in oleylamine (OLA) and isophorondiamine (IPDA) at a ratio of 1:3 as well as a Se solution in trioctylphosphine (TOP) under N2 flow at atmospheric pressure at a reaction temperature of 235 °C. X-ray diffraction and Raman spectroscopy were used to track the reaction mechanisms associated with various solvents. A growth mechanism, distinct from that associated with TOP/OLA, promoted the formation of nanoparticles and improved the reactivity provided by the addition of IPDA solvent through double N-chelation. The reaction mechanism involved in stannite Cu2 ZnSnSe4 phase crystallization from Cu2 SnSe3 and ZnSe is supported by theoretical analysis. The monodispersed CZTSe nanocrystals are polycrystalline and 20-30 nm in size. Optical measurements revealed a direct band gap of 1.42 eV. This study presents a relatively simple, low cost coordinating solvent route for the synthesis of CZTSe nanoparticles, applicable to the fabrication of low-cost thin-film solar cells.


Applied Surface Science | 2012

Effect of temperature on the deposition of ZnO thin films by successive ionic layer adsorption and reaction

Shih-Chang Shei; Pay-Yu Lee; Shoou-Jinn Chang


Journal of environmental chemical engineering | 2015

Photoelectrochemical characterization of n-type and p-type thin-film nanocrystalline Cu2ZnSnSe4 photocathodes

Pay-Yu Lee; Sheng-Po Chang; Shoou-Jinn Chang


International Journal of Electrochemical Science | 2013

Sensing Performance of EGFET pH Sensors with CZTSe Nanoparticles Fabricated on Glass Substrates

Pay-Yu Lee; Sheng-Po Chang; Po-Jui Kuo; En-Hao Hsu; Shoou-Jinn Chang; Shih-Chang Shei


International Journal of Electrochemical Science | 2013

Highly Transparent Nanostructured Zinc Oxide Photodetector Prepared by Successive Ionic Layer Adsorption and Reaction

Pay-Yu Lee; Sheng-Po Chang; Jui-Fu Chang; En-Hao Hsu; Shoou-Jinn Chang


Solar Energy Materials and Solar Cells | 2014

Synthesis of CZTSe nanoink via a facile one-pot heating route based on polyetheramine chelation

Pay-Yu Lee; Sheng-Po Chang; En-Hao Hsu; Shoou-Jinn Chang


Materials Letters | 2013

Synthesis of Cu2ZnSnSe4 nanocrystals from metal sources using a facile process in isophorondiamine

Pay-Yu Lee; Shih-Chang Shei; En-Hao Hsu; Shoou-Jinn Chang; Sheng-Po Chang


Materials Letters | 2013

A novel synthesis of Cu2SnSe3 nanoink prepared via elemental sources and isophorondiamine chelation

Pay-Yu Lee; Shih-Chang Shei; En-Hao Hsu; Shoou-Jinn Chang


Journal of Alloys and Compounds | 2013

Influence of rinsing temperature on properties of ZnO thin films prepared by SILAR method with propylene glycol

Shih-Chang Shei; Pay-Yu Lee

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Shoou-Jinn Chang

National Cheng Kung University

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Sheng-Po Chang

National Cheng Kung University

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Shih-Chang Shei

National University of Tainan

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En-Hao Hsu

National University of Tainan

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Po-Jui Kuo

National Cheng Kung University

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