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Questions related from Chenjin Lu
It is generally known that a higher surface recombination velocity (SRV) tends to lower the device performance (e.g. Voc) due to a higher recombination at the metal and semiconductor interface....
07 July 2019 4,975 3 View
I am very new to the area of thin film fabrication using electrochemical deposition method. Thus could any one inform me what is the most useful book or studying material for one who wants to...
09 September 2018 2,359 0 View
Can any one share with me the paper that has deep discussion about the doping density in those Transitional Metal Oxides (TMOs) material?? I find that in those literature that people reported...
08 August 2018 4,833 0 View
Hi I want to simulate ITO/c-Si junction behavior and solar cell performance. Therefore, here comes to a question about Silvaco TCAD simulator. Is that possible to model TCO layer such as ITO as a...
06 June 2018 7,230 5 View
Can anyone explains that why drift current is independent of the bias voltage? I thought the drift current is dependent on the bias voltage. The drift current equation tells us that the drift...
03 March 2018 9,984 1 View
Hi all, I want to disperse Mo nanopowder into IPA solvent. I am planning to adding some dispersing agent and use ultrasonic treatment. However, I am not sure what kind of dispersing agent should...
10 October 2017 2,344 2 View
Hi all, I prepared some transitional metal oxide solution by mixing nano powder transitional metal with organic solvent and some H2O2. Then I deposited the solution on silicon using spin coating....
10 October 2017 10,093 9 View
How can I measure the transition metal oxide thin film electrical property, especially for some low conductivity film like MoO3.
07 July 2017 3,121 3 View
I noticed that it seems the extinction coefficient. similarly for refractive index, of an oxidized material is much lower than the one without being oxidized. I check the Ti/TiO2, Mo/MoO3,...
02 February 2017 3,841 2 View
Hi, I am planning to boiling the solution with mixture of hydrogen peroxide and ethanol. What safety issue it may be exposed to and what should I do to prevent it? Should I evaporize the solution...
02 February 2017 3,925 4 View
From what I know is after HF etching of the Si surface, the SiOx is removed and the surface is left with H-terminal on top of Si. Since H is more electronegative than Si, As a result H is negative...
01 January 2017 2,453 4 View
I noticed that there is a sudden rise in the current at certain voltage (please see attachment). Initially I thought it could be the problem of wire connection. However, it still presents after...
12 December 2016 3,589 5 View
When I measure the lifetime of wafers, using the instrument from Sinton, I find a strange result. The group with HF etching to remove native oxide on Si wafers has higher lifetime compared to with...
11 November 2016 696 2 View
In poly silicon thin film people usually use nip structure to obtain higher absorption at the bottom p-doped layer. However, why as for a-Si:H solar cell design, pin structure is preferred? In...
09 September 2016 9,708 3 View
It is pretty clear that non-radiative recombination (surface recombination) greatly reduce the Voc in solar cells. How about radiative recombination. I would think of high radiative recombination...
09 September 2016 991 15 View
Hi, I am just wondering how people define primary flat and secondary flat. I know in and Silicon Wafer, there are both p and n type. 90° angle between flats indicates it...
09 September 2016 3,390 4 View
Dear all, I am bothered by when should I use RS or XRD in the solar cell structural analysis. In other words, the advantage and disadvantage of RS and XRD. I have seen many papers use RS or XRD to...
08 August 2016 1,232 3 View
I know as least for nanosecond, or even picosecond, laser in which there is enough time dumping out energy that will be absorbed by Si. However, as for femtosecond laser, the times seems to be too...
08 August 2016 7,797 7 View
I have seen that people are trying to use laser annealing to replace RTA due to its localized treatment without damage substrate like glass (e.g. borosilicate glass). The reason given is that due...
08 August 2016 6,980 0 View
