A5030808869- Chalcogenide Semiconductor Thin Films
- Quantum Dots Synthesis And Properties
- Copper-based nanomaterials and applications
- Semiconductor materials and interfaces
- Silicon and Solar Cell Technologies
- Silicone and Siloxane Chemistry
- Thin-Film Transistor Technologies
- Nanomaterials and Printing Technologies
- Nanowire Synthesis and Applications
- solar cell performance optimization
- ZnO doping and properties
- Greenhouse Technology and Climate Control
- Polymer Nanocomposites and Properties
- Photopolymerization techniques and applications
- Semiconductor materials and devices
- Silicon Nanostructures and Photoluminescence
- Energy and Environment Impacts
- Industrial Vision Systems and Defect Detection
- Hybrid Renewable Energy Systems
- Transition Metal Oxide Nanomaterials
- Surface Roughness and Optical Measurements
- Mesoporous Materials and Catalysis
- Chemical Synthesis and Characterization
- Catalysis and Oxidation Reactions
- Color Science and Applications
Korea Institute of Energy Research
2015-2024
Korea University of Science and Technology
2016-2024
University of Science and Technology
2019
Daejeon University
2017
United States Department of Energy
2013
Korea Advanced Institute of Science and Technology
1998-2005
A common feature of the inorganic thin films including Cu(In,Ga)(S,Se)2 fabricated by nonvacuum solution-based approaches is doubled-layered structure, with a top dense film and bottom carbon-containing residual layer. Although latter has been considered to be main efficiency limiting factor, (as source high series resistance), exact influence this layer still not clear, contradictory views are present. In study, using CISe as model system, we report experimental evidence indicating that...
The addition of small amounts Ag to Cu(In,Ga)Se 2 (CIGS) absorbers improves the device performance CIGS solar cells by changing film microstructure, alkali distribution, and electrostatic conditions CIGS.
We previously demonstrated a hybrid ink consisting of synthesized Cu–Se ([Cu] > [Se]) nanoparticles and an indium (In) precursor solution to form CuInSe2 (CIS) thin films. In the solution, monoethanolamine (MEA), which exhibited better performance than different alkanolamine, triethanolamine (TEA), was used as chelating agent bind nanoparticles. MEA easily forms complex with Cu in To observe effect Cu–MEA ink, Cu-rich were washed reduce content through formation complex. As result, films...
Present study employes a picosecond laser (532 nm) for selective P1 scribing on the indium tin oxide (ITO) layer and subsequent fine‐tuning of conditions with machine learning (ML) techniques. Initially, is performed by varying different parameters further evaluate them via an optical microscope two probe resistivity measurements. The corresponding width sheet resistance data are used as input databases ML analysis. classification regression tree (CART)‐based analysis revealed that median...
A new organic–inorganic hybrid material (HYBRIMER) has been synthesized homogeneously through a non-hydrolytic sol–gel process. The HYBRIMER shows efficient index control and minor volume contraction behavior during micro-scale molding. In materials, the methacrylic end-group is considered suitable for cross-linking UV curing step, while fluorinated functionality appropriate refractive control. As silane contents are varied, structural evolution of resin then controlled (1.469 to 1.513 at...
Abstract The molecular structures of methacryl‐grafted polysiloxane resins from 3‐(trimethoxysilyl)propyl methacrylate (MPTS) and diphenylsilanediol (DPSD) were determined by theoretical computation experimental measurement. obtained coincided well with those measurement, we found that the structural changes in could be controlled precursor compositions. While weights chain lengths increase DPSD contents, their sizes do not vary significantly. In present study, shapes various compositions...
CdS has been known to be one of the best junction partners for Cu(In,Ga)Se2 (CIGS) in CIGS solar cells. However, use thick buffer decreases short-circuit current density There are two obstacles that limit ultrathin CdS. The first is plasma damage during preparation transparent conducting windows and second a low shunt resistance due direct contact between window via pinholes thin buffer. In other words, avoid paths, we may have thicker than necessary form high-quality CdS/CIGS junction. This...
Abstract CuInSe 2 (CISe) absorber layers for thin‐film solar cells were fabricated through the selenization of amorphous Cu–In–S nanoparticles, which prepared by using a low‐temperature colloidal process within one minute without any external heating. Two strategies obtaining highly dense CISe films used in this work; first was modification nanoparticle surface chelate complexation with ethanolamine, and second strategy utilized lattice expansion that occurred when S atoms precursor...
CuInSe2 (CIS) absorber layers for thin film solar cells were fabricated via a non-vacuum route using amorphous Cu–In–Se nanoparticle precursors prepared by low temperature colloidal process within one minute of reaction without any external heating. In particular, we intentionally added chelating agent to the colloid in order increase density final films enhancing viscous flow precursor materials during high selenization. This is based on decreased reactivity particles due formation chelate...
Flexible metal network transparent conducting electrodes (TCEs) are expected to be the most promising candidates replace indium tin oxide (ITO) due their excellent electro-optical performance and mechanical flexibility. However, successfully ITO with TCEs, more studies on suitability for integration real devices needed. In this study, we developed a hierarchical silver simultaneously meeting requirements of (i) low sheet resistance, (ii) high optical transmittance, (iii) flexibility, (iv)...
Chalcopyrite-based materials for photovoltaic devices tend to exhibit complex structural imperfections originating from their polycrystalline nature; nevertheless, properly controlled are surprisingly irrelevant them in terms of resulting device performances. The present work uses atom probe tomography characterize co-evaporated high-quality Cu(In,Ga)Se2 (CIGS) films on flexible polyimide substrates either with or without doping Na followed by K via a post-deposition treatment. intent is...