Session Index

Perovskite layer is formed using by two-step sandwich evaporation technique (SET). First, we spin coating MAI and combine PbI2 by thermal evaporation. Second, we evaporate MAI at low-pressure to make better morphology of perovskite crystallize. Through the double-interdiffusion using SET, one can enhance the perovskite solar cells to high PCE=14.6%.

 

A bifacial perovskite solar cells with an active area of 1.02 cm2 deliver a remarkable efficiency of 14.66% after optimizing the transmittance and sheet resistance of IZO, and the finger Au spacing. Eventually, a promising PCE of 20.92% for four-terminal perovskite/silicon tandem cell with 1.02 cm2 active area is demonstrated.

 

The plasmonic effects of the silver nanoparticles embedded in TiO2 antireflective layer on the front-side surface and up-conversion of YF3:Yb3+/Er3+-doped phosphors layer on the back-side surface of silicon solar cells to enhance cell’s efficiency, of 23.68% and 1.39%, respectively, are experimentally demonstrated in this study.

 

The silicon-based photodetector is limited by the 1.1 eV energy gap and the cut-off wavelength is about 1.2 μm. In this work, Schottky barrier formed by nickel silicide can effectively extend the cut-off wavelength. Furthermore, the annealing process improves the infrared light signal-noise-ratio (SNR) of the photodetector.

 

In this study, perovskite solar cells based on three different solvents of PbI2 (DMF, DMSO, and DMF/DMSO with a volume ratio of 7:3) are fabricated by using two-step method. With the improvements of surface morphology and crystallinity of perovskite layer, a decent photoelectric conversion efficiency of 6.02 % is achieved.

 

CsPbIBr2 is considered as an ideal candidate with proper bandgap. Nevertheless, the working stability hinders its further application. The instability due to ion migration is inhibited by introducing large size cation as shown by PL This approach also leads to improved stability against moisture and light.

 

This work utilizes a thin Cu-Ag alloy as the electrode of a semitransparent organic solar cell. The PCE of the semitransparent device is 1.26% with EQE more than 20% in the infrared spectrum. The semitransparent shows favorable AVT exceeding 77%, which is beneficial for see-through applications.

 

We have investigated on the influence of the electron transport layer on the injection voltage of perovskite light-emitting diodes . Now we change the film thickness of the capping layer PC61BM to see how it changes the injection voltage.

 

We propose a simple approach to construct flexible rGO photodetectors on paper substrates. The photodetector shows an on off ratio of 1.25 and a responsivity of 18.73 mA/W under 532 nm laser illumination. Our results provide a strategy for fabricating rGO-based photodetectors which show a potential for wearable systems applications.

 

We reported a simple evaporation process to deposited a lead iodide (PbI2) film followed with a methylammonium iodide (MAI) solution dip coating to prepare a MAPbI3 perovskite. Consequently, the as-fabricated MAPbI3 perovskite solar cell yielded a power conversion efficiency (PCE) of 8.7%.

 

We have investigated on the improvement of efficiency of perovskite solar cells (PSCs) with different perovskite precursor solution. Finally, the optimized device with the DMF:DMSO with a v/v of 4:1 exhibits high power conversion efficiency(PCE) and high external quantum efficiency (EQE).

 

Perovskite single crystals ideally exhibit better optoelectronic properties than polycrystalline thin films because they possess lower defect densities. Herein, we find that dripping TOPO on the surfaces of perovksite single crystals improve their photovoltaic performance. The power conversion efficiency is averagely improved from 11.9% to 14.76% after the surface passivation.