Korea University · Engineering
Professor Jin Hyuck Heo's research lab specializes in the development of solution-processed perovskite-based optoelectronic devices, with a strong focus on solar cells and X-ray detectors. The lab explores novel fabrication techniques—such as spin-coating, spray coating, and solvent engineering—to achieve high-efficiency, stable, and hysteresis-free perovskite devices. Key research directions include compositional engineering of hybrid and all-inorganic perovskites, interface optimization, and the design of tandem and planar heterojunction architectures for enhanced performance. The lab also emphasizes practical scalability and commercial viability, aiming to bridge the gap between laboratory-scale prototypes and real-world applications in renewable energy and medical imaging.
Figures are computed from collected data and may differ slightly.
The inverted CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> planar hybrid solar cells exhibited better device efficiency and stability and lower hysteresis than the normal cells.
Readily commercializable and cost-effective next-generation CsPbBr<sub>3</sub> perovskite nanocrystals (PNCs) based X-ray detectors are demonstrated. The PNCs-based X-ray detector exhibits higher spatial resolution (9.8 lp mm<sup>-1</sup> at modulation transfer function (MTF) = 0.2 and 12.5-8.9 lp mm<sup>-1</sup> for a linear line chart), faster response time (≈200 ns), and comparable stability (>40 Gy<sub>air</sub> s<sup>-1</sup> of X-ray exposure) compared with the commercialized terbium-doped
A power conversion efficiency of 10.4% is demonstrated in planar CH3 NH3 PbBr3 hybrid solar cells without hysteresis of the J-V curve, by way of controlled crystallization in the spin-coating process. The high efficiency is attributed to the formation of a dense CH3 NH3 PbBr3 thin film by the introduction of HBr solution because the HBr increases the solubility of the CH3 NH3 PbBr3 and forms a thinner CH3 NH3 PbBr3 layer with full surface coverage.
Planar CH3NH3PbI3 perovskite solar cells with constant 17.2% average power conversion efficiency irrespective of the scan rate are described. These properties are attributed to the formation of a pure CH3 NH3 PbI3 thin film by the introduction of a HI solution. Thereby, charge-injection/separation efficiency, charge-collection efficiency, diffusion coefficient, carrier lifetime, and traps are improved. As a service to our authors and readers, this journal provides supporting information supplied
We fabricated highly efficient planar type CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3−x</sub>Cl<sub>x</sub> (MAPbI<sub>3−x</sub>Cl<sub>x</sub>) mixed halide perovskite solar cells <italic>via</italic> spray coating with a controlled composition of the solvents.
Perovskite–perovskite tandem solar cells with open-circuit voltages of over 2.2 V are reported. These cost-effective, solution-processible perovskite hybrid tandem solar cells with high open-circuit voltages are fabricated by the simple lamination of a front planar MAPbBr3 perovskite cell and a back MAPbI3 planar perovskite solar cell. As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer reviewed and may be re-orga
A highly efficient PEN/ITO/ZnO/CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> perovskite/PTAA/Au flexible planar solar cell with 1.1 V <italic>V</italic><sub>oc</sub>, 18.7 mA cm<sup>−2</sup><italic>J</italic><sub>sc</sub>, 75% FF, and 15.4% <italic>η</italic> for the forward scan direction and 1.1 V <italic>V</italic><sub>oc</sub>, 18.7 mA cm<sup>−2</sup><italic>J</italic><sub>sc</sub>, 76% FF and 15.6% <italic>η</italic> for the reverse scan direction under illumination of 1 Sun was demonstrated.
Preserving the stability of Sn-based halide perovskites is a primary concern in developing photovoltaic light-absorbing materials for lead-free perovskite solar cells. Whereas the addition of SnX<sub>2</sub> (X = F, Cl, Br) has been demonstrated to improve the photovoltaic performance of Sn halide perovskite solar cells, the mechanistic roles of SnX<sub>2</sub> in the performance enhancement have not yet been studied appropriately. Here we perform a comparative study of CsSnI<sub>3</sub> films a
Semi-transparent MAPbI<sub>3</sub>planar sandwich solar cells were fabricated by simply laminating an F doped tin oxide/TiO<sub>2</sub>/MAPbI<sub>3</sub>/wet hole transporting material with additives and PEDOT:PSS/indium tin oxide (ITO).
Super flexible TCO-free FAPbI<sub>3−x</sub>Br<sub>x</sub>planar type inverted perovskite solar cells with a 17.9% power conversion efficiency under 1 sun conditions were demonstrated by introducing an APTES (3-aminopropyl triethoxysilane) adhesion promoter between a PET flexible substrate and a AuCl<sub>3</sub>-doped single-layer graphene transparent electrode.
Super-flexible bis(trifluoromethanesulfonyl)-amide (TFSA)-doped graphene transparent conducting electrode (GR TCE)-based FAPbI<sub>3 − x</sub>Br<sub>x</sub> perovskite solar cells with 18.9% power conversion efficiency (PCE) for a rigid device and 18.3% for a flexible one are demonstrated because the TFSA-doped GR TCE reveals high conductivity and high transmittance.
In this review, we discuss the current state-of-art, research gateways and future prospects of flexible (bendable) perovskite solar cells (PSCs) towards their eventual commercialization.
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