Jaehyun Kim

11 Questions 8 Answers 0 Followers

Questions related from Jaehyun Kim

How should i interpret this J-V characterisics in oled devices(attach pictures)?

i know that the current density characteristics in oled device are as follows. 1) ohmic current region 2) charge trapping region 3) space charge limited region and in 2) charge trapping region,...

02 February 2019 2,555 6 View

In QD-OLED, anybody here who know why the surface of metal oxide(HIL) is treated by o3-plasma or uv-ozone?

when i research papers about inorganic HIL in QLED, i found some paper that use CuO, NiO.. transition metal oxide. they have structure of ITO/TMO/PVK/QD/ZnO/Al and after TMO is coated in ITO, TMO...

12 December 2018 7,629 0 View

When the work function chage by ozone treatment on metal oxide surface, is it only on the surface?

when i deposit metal oxide on ITO substrate by spin coat if the surface of metal oxide is treated by ozone treatment like UV-ozone or O3-plasma, is work function chage only limited to the...

12 December 2018 4,024 5 View

Anybody here who konw how to and when to add stabilizer in NiO nanoparticles powder?

hi, im studying inorganic material NiO nanoparticle as hole injection layer in OLED. i sysnthesis NiO nanoparticles by solvothermal. after solvothermal process, i cetrifugate and wash the...

11 November 2018 5,752 5 View

Why non-rectifying junctions occur in ITO/metal oxide/Al structure?

hi im studying inorganic material as HIL in OLED. i sysnthesis NiO nanoparticles by was of solvothermal as HIL material. and i fabricated OLED devices that have the structure of...

11 November 2018 3,991 5 View

What is the role of acetic acid as stabilizer in NiO nanoparticle solution?

i'm studying inorganic material in QD-OLED and have sysnthesised NiO nanoparticles. at first , i didn't use stabilizer acetic acid. but afterward i realized that i had to use acetic acid as...

10 October 2018 5,722 5 View

What is the role of acetic acid as stabilizer in nickel oxide nanoparticles?

i'm studying inorganic material in QD-OLED and have sysnthesised NiO nanoparticles. at first , i didn't use stabilizer acetic acid. but afterward i realized that i had to use acetic acid as...

10 October 2018 8,741 0 View

When the ZnO synthesis, how to dry the precipitate that is in tube?

i have synthesize ZnO nanoparticle. in last process, after the tube containing the solution was centrifuged , the white precipitate remains in the tube bottom. then i add ethanol to obtain ZnO...

06 June 2018 2,886 9 View

About current density - voltage graph in ITO/PEDOT:PSS ?

i fabricate OLED device. the structure is ITO/PEDOT:PSS/PVK/QD/ZnO/Al. To see the hole injection , i fabricated ITO/PEDOT:PSS/Al. then i checked the cureent density - voltage. most of the graphs...

06 June 2018 9,481 4 View

When i use thermall evaporation, can i use duplicate source materials?

thermal evaporation of our labortory is being used as an Al(aluminum) deposition. but i want to deposit WO3(tungsten oxide) with this thermal evaporation instrument. is not the vacuum chamber...

05 May 2018 6,741 4 View

When spin coating, how to judge whether the up-layer affects the down-layers?

i'm going to stack layer with spin coater in ito substrate. ITO/WO3/NiO/Al (Al is deposited by thermal evaporation) the solvent of NiO is ethanol. and as a result of my research, the solvent of...

05 May 2018 913 2 View