Which one is more efficient, transient photo-current or time resolved photo-luminescence to measure the minority carrier life time in a semiconductor?

More Bazlul Karim's questions See All

How photo luminescence (PL) can be used to measure the absorption coefficient of a semiconductor film?

What are the procedures to obtain optical absorption coefficient from PL data of a given semiconductor film? How PL data differs from the UV-Vis-NIR absorption spectroscopy data? Which one is...

02 March 2019 6,322 6 View

Can anyone tell me what is the band gap energy of Zinc selenite (ZnSeO3) with proper references please?

What is the band gap energy and band structure of the metal selenite namely, ZnSeO3? Does it have any semiconductor property?

10 November 2017 8,426 2 View

Is there any co-relation between band gap energy and defect states (reside within the band gap) in a semiconductor material?

Does narrowing or enlargement of band gap energy of a semiconductor material due to different processing conditions like annealing, doping etc have any impact on the defect states (interface, deep...

05 June 2017 8,300 9 View

Is absorption co-efficient synonymous to photo-sensitivity of a semiconductor material especially when it is grown in polycrystalline thin film form?

05 June 2017 3,022 5 View

Physics: Why do we describe light by referring to its wavelength, but microwaves and radar pulses by referring to their frequency?

In physics, the description of the properties of light generally refers to its wavelength (nm), while in the range of microwaves and radio waves we refer to the frequency of a signal (e.g. kHz or...

03 March 2021 1,682 3 View

Why does blocking with my immunogenic peptide cause nuclear fluorescence in ICC?

Hi all, I am validating a polyclonal antibody raised against human ANT4, through WB and ICC. In most of my controls, the antibody shows very little off-target binding, but when I pre-incubate the...

03 March 2021 5,999 3 View

What is your perception on using visual analysis or quantitative approaches to evaluate data from single-case research designs (n of 1 trials)?

Results of single-case research designs (i.e., n-of-1 trials) are often evaluated by visually inspecting the time-series graph and computing quantitative indices. A question our research team is...

03 March 2021 687 1 View

Irradiation data for JAPAN?

Hi, Could you help me to get the latest (2019, 2020) solar resource data for a particular site in JAPAN? PV GIS and NSRDB data are not in reach to JAPAN, I'm looking for some other database for...

03 March 2021 961 3 View

Why are the velocities so high in my Boussinesq approximation Fluent simulation?

Hello, I have a mechanism where air rises due to convective flows. In this simulation, nothing is driving the air except this. I understand that the Boussinesq approximation only works for small...

02 March 2021 4,910 3 View

Is There Any Feasible Method To Test Fluorescent Compounds Other Than Fluorescence Spectrometers ??

Is There Any Feasible Method To Test The Efficiency Of Fluorescent Compounds Other Than UV Spectrometers ? Suggestions Would Be Appreciated !

02 March 2021 5,785 3 View

Is there any effect of different colours of light (white, red, yellow, blue etc.) on the rate of photosynthesis? If yes, why?

Light is inevitable for the process of photosynthesis reaction. Naturally sunlight plays the vital role for this process. Light may be of different colours like white, red, yellow, blue etc....

02 March 2021 7,890 2 View

Does Napabucasin soluble in dichloromethane and in ethanol?

I need to prepare a solution of Napabucasin (inhibitor of cancer cell stemness) in dichloromethane. The drug is expensive, so maybe somebody already tried to do it. If it is soluble, what is the...

02 March 2021 9,945 3 View

Help request in CST microwave?

im working now on TPV solar cells and metamaterials and i realy need our help in CST microwave i have a tpv cell simulation and i want to extract particullarly the absorbtion of only the active...

02 March 2021 2,246 2 View

What are anisotropic electrical and optical properties of a semiconductor due to?

In some materials, properties such as band gap, thermal conductivity differ along different crystallographic axes. What are the basics?

01 March 2021 1,923 3 View

Harikesh P C

I am not sure if minority carrier lifetimes can be extracted using Transient Photo-current. It is more like charge extraction study on the full device and may be influenced by several other factors. Can you share any such studies ?

Bazlul Karim

Hello Harikesh,

Well, there are instances where people have used Photo Conductivity Decay (PCD) or microwave detected photo conductivity (MPD) to measure the recombination lifetime of thin film semiconductors, even in case of halide perovskite.

If one considers low level injection, the SRH recombination dominates over others, and under this condition the normalized photo-conductivity decay provides with the minority carrier lifetime. To minimize the effect of trap assisted emission and band-to-band recombination, 25% of the top and bottom of the photo-conductivity decay curve is being ignored.

Vesselin Donchev

I think in the past people used mainly PC transients (see e.g. Ryvkin, S. M., 1964, Photoelectric effects in semiconductors. New York, Consultants Bureau.) because it was simpler. Later, when good apparatus for TRPL became available, people uses TRPL taking advantage of the non-contact measurements.

Abhishek Maiti

I think time resolved photo-luminescence is better than the transient photo-current measurement. Time resolved photo-luminescence is performed in a non contact mode whereas transient photo-current measurement is executed in a contact mode. Parameters came from the contact may hamper the measurement.