A5004303830- Perovskite Materials and Applications
- Conducting polymers and applications
- Chalcogenide Semiconductor Thin Films
- Solid-state spectroscopy and crystallography
- Quantum Dots Synthesis And Properties
- Organic Electronics and Photovoltaics
- Silicon and Solar Cell Technologies
- Luminescence Properties of Advanced Materials
- Organic Light-Emitting Diodes Research
- Thin-Film Transistor Technologies
- Nanowire Synthesis and Applications
- solar cell performance optimization
- Semiconductor materials and interfaces
Hanyang University
2023-2024
Anyang University
2023-2024
Korea Institute of Energy Research
2016-2023
Kyungpook National University
2020
Government of the Republic of Korea
2020
Ulsan National Institute of Science and Technology
2016-2019
Operating in wet conditions The high efficiency of the complex organic molecule Spiro-OMeTAD as a hole-transporting material for perovskite solar cells requires use hygroscopic dopants that decrease stability. Jeong et al. synthesized hydrophobic fluorinated analogs materials have favorable shifting electronic state hole extraction and used them to fabricate cells. A champion device had certified power conversion 24.8% an open-circuit voltage near Shockley-Queisser limit. These devices could...
Improvements to perovskite solar cells (PSCs) have focused on increasing their power conversion efficiency (PCE) and operational stability maintaining high performance upon scale-up module sizes. We report that replacing the commonly used mesoporous–titanium dioxide electron transport layer (ETL) with a thin of polyacrylic acid–stabilized tin(IV) oxide quantum dots (paa-QD-SnO 2 ) compact–titanium enhanced light capture largely suppressed nonradiative recombination at ETL–perovskite...
Record power conversion efficiencies (PCEs) of perovskite solar cells (PSCs) have been obtained with the organic hole transporter 2,2',7,7'-tetrakis(N,N-di-p-methoxyphenyl-amine)9,9'-spirobifluorene (spiro-OMeTAD). Conventional doping spiro-OMeTAD hygroscopic lithium salts and volatile 4-tert-butylpyridine is a time-consuming process also leads to poor device stability. We developed new strategy for that avoids post-oxidation by using stable radicals as dopant ionic modulator (referred...
Abstract Hole transport materials (HTMs) play essential roles in achieving high photovoltaic performance and long‐term stability the n–i–p structure of perovskite solar cell (PSC) devices. Recently, dopant‐free polymeric as HTMs PSCs have attracted considerable attention owing to carrier mobility excellent hydrophobicity. However, similar efficiencies those doped small molecule such Spiro‐OMeTAD is a big challenge. Herein, thienothiophene π‐bridge selected stabilizer energy level regulator...
We optimize the thickness of a transparent conducting oxide (TCO) layer, and apply microscale mesh-pattern metal electrode for high-efficiency a-Si/c-Si heterojunction solar cells. A cell equipped with proposed microgrid demonstrates high short-circuit current density (JSC) 40.1 mA/cm(2), achieves efficiency 18.4% an open-circuit voltage (VOC) 618 mV fill factor (FF) 74.1% as result shortened carrier path length decreased area electrode. Furthermore, by optimizing process sequence formation,...
Three new hole transport materials were designed using an end-group strategy for perovskite solar cells to achieve remarkable efficiency approaching 25% at a low concentration in environmentally friendly solvent.
Perovskite-based tandem solar cells are promising candidates for next-generation photovoltaic devices. However, the defects caused by ion migration cause a large deficit of open-circuit voltage (VOC) in conventional wide-band-gap perovskite films. Here, we present new strategy that employs nontoxic acetic acid and isopropanol as solvents to deposit film with 2.0 eV band gap an ambient atmosphere. The situ formed acetate anions strongly stabilize intrinsic These features effectively improve...
The effect of cationic chlorides has been studied to achieve high quality perovskite films, for performance solar cells.
Perovskite solar cells (PSCs) have been in the spotlight as a promising next-generation cell. With tremendous development of power conversion efficiency (PCE) over past decades, considerable amount research has focused on semi-transparent perovskite for applications. however, short-circuit current density (JSC) greatly decreases PSCs with an increase transmittance, and this results significant decrease PCE. In study, were fabricated by controlling absorption layer thickness aperture ratio...
Perovskite solar cells (PSCs) have been in the spotlight as a promising next-generation cell. With tremendous development of power conversion efficiency (PCE) over past decades, considerable amount research has focused on semi-transparent perovskite for applications. however, short-circuit current density (J SC ) greatly decreases PSCs with an increase transmittance, and this results significant decrease PCE. In study, were fabricated by controlling absorption layer thickness aperture ratio...