Specialty Chemistry Forums > Materials and Nanochemistry forum
what is the purpose of measuring the quatum yield?
(1/1)
Exploring:
I have seen in many papers the measurement of the QUANTUM YIELD. However, I do not see what is the practical use of it. Any suggestion?
thanks
Babcock_Hall:
Have you looked into photosynthesis at all?
wildfyr:
It helps us gauge how efficient photoreaction is.
Enthalpy:
In many cases, the quantum yield is the hard limit, hence it tells you, better than a power yield for instance, how far a process is from the best possible yield. This makes it also a tool for understanding.
Take for instance visible light on a silicon photodetector. You get almost on electron photocurrent per incident photon, which is the limit. It explains you why amps of photocurrent per watt of light drop at shorter wavelength: just because a joule of blue light contains fewer photons than with green light. Having checked the quantum yield, you know that competitor detectors working similarly won't do better.
Exploring:
thanks a lot for the answers, especially to Enthalpy.
I know what is about.
However, in real industrial examples, I was not sure how important is that measurement, and how to compare among samples.
Navigation
[0] Message Index
Go to full version