Why is getting uniform and dense perovskite (CH3NH3PbI3) film is challenging?

06 June 2015 0 4K Report

How one can master this art? SEM and XRD can help, but what might be the most reproducible way. Do it required to be trained from people who have already achieved it?

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How we can prepare SnO2 (tin oxide) paste for screen printing from commercially available nano-particles (18-20 nm size)?

I am familiar for making paste out of Al2O3 nano-particles with TERPINOL AND ETHYL CELLULOSE, but was wondering if any one is familiar with a direct method to prepare SnO2 paste. Thanks.

10 November 2018 425 4 View

Why the series connected tandem solar cells with mis-matched photo-current result in low fill factor?

What causes the lower fill factor, in series connected tandem solar cells with slightly different photocurrent for each device.

01 February 2017 2,583 0 View

How can I reduce the aggregation of organic dyes on TiO2 surface for DSSC?

Possible options are additions of CDCA-coadsorbate, and co-sensitization. I have tried both options, CDCA do not help a lot by increasing to 100x compared to amount of dye. Co-sensitization...

04 May 2016 1,671 11 View

How can we explain the increase in excited state life time of terephthalic acid after hydroxylation?

Measured excited state life time for terephthalic acid (2.4 ns) and 2-hdyroxyl terephthalic acid (7.6ns) by TCSPC method in acetonitrile which was obtained after monoexponential fitting of the...

09 October 2015 553 2 View

How does UV Stabilizer 3638 works compared to 1164?

UV-Stabilizers are very useful additive for engineering thermoplastics. Since 1164, goes through well studies ESIPT (excited state intramolecular proton transfer) where as 3638 do not have...

08 September 2015 7,849 8 View

Is ESOP(excited state oxidation potential) in eV (electron volt) different than LUMO (lowest un-occupied molecular orbital) in eV of a molecule?

On what basis these are different? Do same applied to GSOP ( ground state oxidation potential) and HOMO level of a molecule?

08 September 2015 3,997 4 View

Acetonitrile (ACN) vs. toluene as a solvent for photophysical studies of organic systems?

I measured the Nano-second transient absorption spectroscopy and singlet oxygen emission for a terephthalate based system (attached), in ACN it shows weak fluorescence emission intensity, strong...

07 August 2015 10,017 12 View

What difference it mean from broad vs. sharp triplet-triplet excited state transient abs. signals?

e.g. one attached Fig. 1 (broad) vs. Fig. 2 (slightly sharp) does it tell anything about nature of triplet state? it was measured by using Laser Flash Photolysis nanosecond transient absorption...

06 July 2015 3,755 7 View

What does the sharp versus broad peaks in electronic absorption spectrum tells about nature of electronic transition?

Looking at attached graph for trimers based on terphthalic acid (broad red shifted) and iso-phthalic acid (sharp, blue shifte), I was wondering what kind of effect can cause such change in...

06 July 2015 2,290 10 View

Does anyone have experience with Dimethyl terephthalate or terephthalic acid photophysics and photochemistry?

Most of the literature search for me result into hits which are either done in 1970's or late 80's. I am interested mainly in knowing about transient absorption and photophysical nature singlet,...

05 June 2015 6,534 1 View

• What the possible Persistent Organic Pollutants and Heavy metals present in fluorspar, sediments, and water bodies around its mining area?

Approximate concentrations are require in compared with the WHO permissible limts

11 August 2024 2,723 1 View

Which type of compound does lamda max of 218 indicate in a uv-vis spectrum of a partially purified compound through column and TLC?

A crude extract of fungal culture using EtOH was subjected to column and TLC and partially purified compound was obtained. UV vis spectrum of the compound/s has max absorbance at 218nm. The...

11 August 2024 9,801 2 View

Basis set and input instruction to calculate HOMO and LUMO using Orca for Imidazolium based organic salts?

Hey there, As a synthetic chemist delving into theoretical calculations for my imidazolium-based organic molecules, I would greatly appreciate any guidance on the appropriate input instructions...

09 August 2024 5,444 7 View

Why Do TDS and EC Increase with Larger Wastewater Volumes, While BOD and COD Decrease?

I have carried out MFC experiments on three different volumes, 50, 500 and 1000 mL of wastewater. Results after MFC treatment shows that TDS and EC are more in larger volumes of water i.e. TDS and...

09 August 2024 9,621 0 View

Could it be a cell culture contamination?

Hello everyone! I observed in my culture (htert-RPE1 cells) an orange- red particle at the bottom of the dish. It is visible to the naked eye as a very very small red dot. Could it be a...

09 August 2024 2,824 3 View

Is there any way to quantify bacterial and fungal cells in their mixed culture?

I am working in fungal fermentation of soybean meal and there is bacterial growth in them at times. I am trying to quantify fungal cell counts and bacterial cells; but I haven't been able to do at...

07 August 2024 7,535 4 View

Stability of the Solar System: Insights from Einstein’s Equations ?

The stability of the Solar System is a complex subject that blends the classical framework of Newtonian mechanics with the modern insights provided by General Relativity (GR). Understanding this...

07 August 2024 2,569 1 View

Separation of organic acids-HPLC?

Hello What should be done to separate and identify organic acids in HPC when their RetTime is the same?Like oxalic acid with Propanoic Acid.or acids that have a very close RetTime.

07 August 2024 8,782 3 View

How to normalize and take the significance of the MTT OD values with 3 replicates for the same cell-line?

Hi, I have a question about normalizing the MTT OD values for doing the statistical analysis. So, if we have 3 different plates and we call them 3 different replicates, so, first we would...

07 August 2024 8,106 4 View

What procedure should I follow for current controlled PPy film electrochemical deposition on ITO?

For example, I perform passivation process before electropolymerization of Py for adhesion to titanium surface. Is a similar or different procedure required for ITO? If necessary, I would be glad...

06 August 2024 3,176 0 View