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Questions related from Jun Park
I want to measure the hydrophilic and hydrophobic properties of the perovskite film I made. However, when I measure the contact angle using water, the film decomposes the moment it touches the...
07 April 2025 6,173 1 View
you can see that the XRD peak is split. This is the first time I've seen this phenomenon. I wonder what the cause is. and how can i fix it? This is a sample with 5nm of Ag deposited on a CsPbBr3...
08 January 2025 9,369 5 View
I grew CsPbBr3 on mica via CVD. When I measured XRD, the main peak on JCPDS was not present in my sample. Why is that? * is mica peak(JCPDS No.00-001-1098). at 8.93, 17.72, 26.75, 35.88. Due to...
09 December 2024 9,115 7 View
We are dealing with agBr via CVD. After CVD, marks like that remain on the quartz boat where agbr was placed, and I wonder how to remove them.
03 September 2024 9,628 1 View
I'm trying to create a new substance. Are there any important considerations when fabricating with CVD? For example, lattice constant If you have any such considerations, please let me know.
16 July 2024 9,700 0 View
I know that I need to calculate lattice mismatch to determine which substrate a particular material can grow on. However, no matter how much I searched, I could not find a way to calculate the...
04 June 2024 6,804 2 View
How small should the lattice constant mismatch be when epitaxy of a material? and in case of A+B -> C, is C the material whose lattice constant must match that of the substrate? Did I...
30 May 2024 8,409 4 View
I know that they work the same way. But what are the structural differences between the devices? What is it that makes them different?
14 March 2024 8,476 2 View
How to distinguish p,ntype in perovskited?
07 March 2024 4,228 1 View
Among the articles I am reading, there is a phrase that says "Bi3+ has a lone pair of electrons in its 6 s subatomic shell, which is responsible for the observable defect screening ability." But I...
29 February 2024 2,436 0 View
Is there a difference in PLQY between direct transition type semiconductors and indirect transition type semiconductors? I am curious about how defects affect PLQY. Also, what is the difference...
28 February 2024 2,483 1 View
i understand, a longer carrier lifetime is better for photodetector than short one. non-radiative semiconductor has longer carrier lifetime than radiative semiconductor. nevertheless, why...
28 February 2024 5,756 3 View
