Soo Yew Hang

12 Questions 17 Answers 0 Followers

Questions related from Soo Yew Hang

In a typical Perovskite Solar Cell, is the thermally evaporated metal electrode semitransparent or fully opaque?

I have deposited silver electrode on top of my hole transporting layer in my perovskite solar cell. When viewing from certain angle the metal electrode looks opaque and reflective, but when...

27 May 2023 9,540 2 View

How do I replace the deionized water in Alfa Aesar SnO2 colloidal dispersion (15 %) with isopropanol?

Should I add in 3A molecular sieves into the SnO2 solution with isopropanol added? I am planning to use it on top of perovskite (MAPbI3) layer but the water comes with the SnO2 solution can damage...

27 April 2021 3,874 5 View

Colour of Methylammonium Iodide (MAI) in Isopropanol (IPA, 99.7%) turned slightly green after storing some time?

Has anyone observed the changes of colour of MAI in IPA to slightly green-ish after storing some time? I might have to prepare fresh solution again if this is abnormal. Could anyone verified the...

19 April 2020 7,676 1 View

Tips for short-circuit proof, Carbon electrode-based Perovskite Solar Cell?

Is there any fool-proof, rookie-friendly tips to fabricate a carbon electrode, hole-transport free perovskite solar cell that is not prone to short circuit? I tried one step spin coating with...

03 March 2020 642 4 View

How to connect Newport's Keithley SMU to perovskite solar cell to measure efficiency?

I have 4 crocodile clip wires, if I'm not mistaken 2 wires (red) connect to anode and the other 2 black wires connect to cathode. Both pairs of wires are plugged at the back of the SMU. Problem...

17 January 2020 3,105 2 View

How to dissolve vanadyl acetylacetonate in isopropanol? What is the yellow coloured solution when trying to dissolve it in isopropanol?

I saw a few articles using vanadium oxide as hole transport material for perovskite solar cell by spin coating vo(acac)2 in isopropanol on substrate. Is the isopropanol capable of dissolving...

25 November 2019 7,833 2 View

Using KOH solution to treat FTO to improve wetabillity without UV-Ozone cleaning?

I have treated my FTO substrate with 1.5 M KOH solution and found it resulted in complete wetabillity of 0.05 mL water. Whereas distilled water treated resulted in incomplete wetting. Seeing as we...

22 November 2019 1,528 2 View

Can I use Phillips Halogen Lamp (70W) to access the light stability of perovskite solar cell under ambient air condition?

We only have 1 Newport Xenon Lamp for PCE measurement. Is halogen lamp a suitable substitute for the Newport Lamp? We don't have the money to purchase another one solely for stability testing. If...

08 November 2019 5,426 6 View

Weighting Methylammonium Iodide in ambient air with 40-60% humidity for perovskite precursor preparation?

Hi, i would like to know will the humidity (40-60%) of the room be detrimental to the MAI powder when weighting on the analytical balance? is the moisture sensitivity reduced when MAI is quickly...

26 June 2019 5,788 4 View

Determining the amount of HAuCl4.3H2O sticking on glass vial inner surface?

Since HAuCl4.3H2O (gold precusor) is very expensive, it is best to utilized it as much as possible. I have a glass vial that contains such gold precursor. Some of it are spread onto the inner...

29 May 2019 10,001 3 View

Spin coating TiO2 blocking layer on FTO, Dynamic or Static Spin Coating?

Dear All, I know that spin coating using titanium isopropoxide can be done to prepare blocking layer for perovskite solar cell but I'm not sure to use static spin coating (adding droplets onto...

16 May 2019 2,536 3 View

How to oxidize titanium layer sputtered on FTO glass to anatase to act as blocking layer?

I have sputtered a layer of Ti on FTO and was hoping to perform anodization on the sample to obtain TiO2 nanotube. However, when semi-transparency is achieved, the TiO2 nanotube peeled along with...

17 March 2019 3,788 4 View