Im-Jun No

Capacitance and Output Current Control by CNT Concentration in the CNT/PVDF Composite Films for Electronic Devices

The carbon nanotube/poly-vinylidene fluoride (CNT/PVDF) composite films for the use of electronic devices were fabricated by spray coating method using the CNT/PVDF solution, which was prepared by adding PVDF pellets into the CNT dispersed N-Methyl-2-pyrroli-done (NMP) solution. The CNT/PVDF composite films were peeled off from the glass substrate and were investigated by the scanning electron microscopy, which revealed that the CNTs were uniformly dispersed in the PVDF films and thickness of the films were approximately . The capacitance of the CNT/PVDF films increased dramatically by adding CNTs into the PVDF matrix, and finally saturated approximately 1880 pF. However, the I-V curves didn`t show any saturation effect in the CNT concentration range of 0 ~ 0.04 wt%. Therefore we can control the performance of the devices from the CNT/PVDF composite film by adjusting the current level resulted from the CNT concentration with the uniform capacitance value.

Time-Variant Characteristics of Organic Thin Film Solar Cell Devices on Plastic Substrates

Two types of organic thin film solar cell devices with bulk hetero-junction (BHJ) structure were fabricated on plastic substrates using conjugated polymers of and blended as active channel layer. Time-variant characteristics of the organic thin film solar cell devices were investigated: short circuit current density (); open circuit voltage (); ; fill factor (FF); power conversion efficiency (PCE, ŋ). All the performance parameters were degraded by progress of the measurement time, while showed the most drastic decrease with time. Possible factors to cause the time-variant alteration of performance parameters were discussed to be clarified.

Field Emission Property of ZnO Nanowire with Nanocone Shape

ZnO nanowires were fabricated by hydrothermal synthesis technique for field emission device application. Al-doped zinc oxide (AZO) thin films were prepared as seed layer of catalyst for the ZnO nanowire synthesis, for which conductivity of the seed layer was tried to be improved for enhancing the field emission property of the ZnO nanowire. The AZO seed layer revealed specific resistivity of and carrier mobility of 18.6[/Vs]. Additionally, upper tip of the prepared ZnO nanowires was treated by hydrochloric acid (HCl) to form a nanocone shape of ZnO nanowire, which was aimed for enhanced focusing of electric field on that and resultingly to improve field emission property of the ZnO nanowires. The ZnO nanowire with nanocone shape revealed decreased threshold electric field and increased current density than those of the simple ZnO nanowires.

A Study on the Performance Improvement for Flexible PCDTBT : PC 71 BM Organic Thin Film Solar Cell by Ozone Surface Treatment of ITO Electrode

【Flexible organic thin film solar cell device with Bulk Hetero-Junction (BHJ) structure was fabricated with blended conjugated polymer of PCDTBT :

ZnO Nanowires Grown by Hydrothermal Synthesis Using Synthesis Solution Prepared with Various Preheating Time

PC_{71}BM

Synthesis of Au Nanowires Using S-L-S Mechanism

as active layer. Surface of ITO anode for the organic solar cell device was treated with ozone. The organic solar cell device with bare ITO showed short circuit current density (

Synthesis and photoluminescence properties of hydrothermally-grown ZnO nanowires on the aerosol-deposited AZO seed layer

J_{sc}

Flag-Type Hybrid Solar Cell in Which a Solar Cell Using a Nanowire and a Nanogenerator Using the Piezoelectric Effect are Coupled Together, and Method for Manufacturing Same

) of

Ferroelectric property of a hydrothermally-grown PbTiO3 film with an aerosol-deposited seed layer

8.2mA/cm^2

Field Emission Characteristics of ZnO Nanowires Grown by Hydrothermal Method

, open-circuit voltage (