Our results reveal that there should be two mainly roles for TPBi blocking layer in enhancing the device performance: (i) separating the hole accumulation interface from the exciton formation zone, which prevents the quenching processes of QD emission caused by these accumulated holes, (ii) suppressing the hole leakage from QDs to ZnO.
With approximately 40-μm-thick mixed-phase (approximately 15.6 wt.% rutile) TiO2 nanofiber as photoanode and 15-nm-thick compact ZnO film as a blocking layer in DSSC, the photoelectric conversion efficiency and short-circuit current are measured as 8.01% and 17.3 mA cm−2, respectively.
The high electron affinity conjugated polymer, poly(2,5-pyridinediyl) (PPy), can be used as the electron-transport/hole blocking layer in a light-emitting diode with poly phenylene vinylene) (PPV) as the emitting layer, ITO as the anode and aluminum as the cathode.
This study characterizes the charge storage characteristics of metal/HfO2/Au nanocrystals (NCs)/SiO2/Si and significantly improves memory performance and retention time by annealing the HfO2 blocking layer in O2 ambient at 400°C.
Our approach gives particular emphasis to the role of the surfaces and the interfaces involved in the TCPP/TiO2/AZO multilayer structures with the intent of proposing the as sputtered TiO2 layer as blocking layer in complete architecture for low thermal budget solutions (<200 °C).
Furthermore, our results indicate that RGO LB films could be an excellent alternative to commercial PEDOT PSS as the effective hole transport and electron blocking layer in light-emitting diode devices.
Our results indicate that RGO LB films are an excellent alternative to commercial PEDOT PSS as the effective hole transport and electron blocking layer in OLED for improving luminance efficiency.
To best of our knowledge, this is the first report of its kind to apply the SHI irradiation technique for obtaining an efficient blocking layer in DSSCs.
Furthermore, it serves as an ultrathin and compact hole blocking layer in perovskite solar cells, resulting in moderate hysteresis effect and improved photovoltaic efficiency from high-transmittance, low capacitance and low series resistance.
Some specific designs on band structure near the active region, including the modifications of the material and thickness of the electron blocking layer (EBL), in the deep violet InGaN laser diodes (LDs) are investigated numerically with the ISE TCAD software.
