Hanbo Jung

7 Questions 6 Answers 0 Followers

Questions related from Hanbo Jung

What is the origin of two peaks for Time-resolved photoluminescence (TRPL)?

I checked time-resolved photo luminescence(TRPL) for CsSnBr3 perovskites thin films (emission wavelength: 693nm, excitation wavelength: 465nm) . But, I observed two peaks which are not...

01 August 2022 1,836 1 View

What is the origin of two peaks for TRPL?

I checked time-resolved photo luminescence(TRPL) for CsSnBr3 perovskites thin films (emission wavelength: 693nm, excitation wavelength: 465nm) . But, I observed two peaks which are not...

11 July 2022 7,767 0 View

Why strange double peak is happened when I measure photoluminescence(PL) with 532nm laser?

I tried to measure PL (with 532 nm laser, power: 2mW, 700V) for CsSnBr3 thin film(500nm) which is 1.8 eV of band gap ( wavelength:690nm). Unfortunately, I observed double around peak...

01 April 2022 7,728 6 View

How to make 30 mM titanium diisopropoxide bis(acetylacetonate) (TDBA) solution in isopropanol?

For c-TiO2 layer onto FTO, I need to make 30 mM titanium diisopropoxide bis(acetylacetonate) (TDBA) solution for spray-pyrolysis. As far as I know, TDBA is usually sold as a solution in IPA...

07 October 2021 5,943 1 View

For perovskite film, how to increase between glass substrates and DMF solution?

I'm fabricating CsSnBr3 perovskite thin film using spin-coating method. I used CsSnBr3 in DMF solution and chlorobenzene was added as a anti-solvent method After water, methanol and acetone...

10 September 2021 7,271 8 View

How to make 0.8M concentration solution of CsSnBr3 in DMSO?

I want to make 0.8 M concentration solution of CsSnBr3 perovskites in DMSO. Since CsBr (212.81g/mol), SnBr2(278.518g/mol) should be added in DMSO with equimolar ratio, I put 170.248 mg (0.8M) of...

31 August 2021 5,842 4 View

Are thin films sealed into glass petri dish suitable for performing XRD patterns?

For protecting my thin films(CsSnBr3) exposure to air, which contain Sn ion and vulnerable to air. So, I consider sealing it into glass petri dish which is amorphous and neglected by XRD peaks. Is...

21 July 2021 1,363 4 View