A definition in semiconductor physics, carrier lifetime is defined as the average time it takes for a minority carrier to recombine. The process through which this is done is typically known as minority carrier recombination. The energy released due to recombination can be either thermal, thereby heating up the semiconductor (thermal recombination or non-radiative recombination, one of the sources of waste heat in semiconductors), or released as photons (optical recombination, used in LEDs and semiconductor lasers). The carrier lifetime can vary significantly depending on the materials and construction of the semiconductor. Carrier lifetime plays an important role in bipolar transistors and solar cells. In indirect band gap semiconductors, the carrier lifetime strongly depends on the concentration of recombination centers. Gold atoms act as highly efficient recombination centers, silicon for some high switching speed diodes and transistors is therefore alloyed with a small amount of gold. Many other atoms, e.g. iron or nickel, have similar effect. (Wikipedia).
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From playlist 1st anniversary
Veterans Day: Living For Those Who Can't | History
After serving 15 years as an Army Ranger in Iraq and Afghanistan, Rocco Vargas struggled to build a life at home. Now, through counseling and personal growth, he works each day on a new mission: to live for those who can't. Subscribe for more HISTORY: http://histv.co/SubscribeHistoryYT
From playlist History Celebrates Veteran's Day
History of the Holidays: History of Memorial Day | History
Learn more about the History of Memorial Day. #HistoryChannel Subscribe for more HISTORY: http://histv.co/SubscribeHistoryYT Check out exclusive HISTORY content: Newsletter: https://www.history.com/newsletter Website - http://www.history.com Facebook - https://www.facebook.com/History Twi
From playlist History Celebrates Memorial Day
History of the Holidays: History of Thanksgiving | History
Although Thanksgiving celebrations dated back to the first European settlements in America, it was not until the 1860s that Abraham Lincoln declared the last Thursday of November to be a national holiday. HISTORY®, now reaching more than 98 million homes, is the leading destination for aw
From playlist History of the Holidays | History
Deconstructing History : Deconstructing History: Grand Central Terminal | History
Grand Central Terminal is one of America's busiest train stations, with over 700,000 people passing through it every day. Find out more about this iconic landmark. HISTORY®, now reaching more than 98 million homes, is the leading destination for award-winning original series and specials
From playlist Web Originals | History
Pearl Harbor: The Last Word - Paving the Way: Nelson Mitchell | History
96-year-old Nelson Mitchell's naval career inspired future generations of African-American servicemen - including his son. Newsletter: https://www.history.com/newsletter Website - http://www.history.com Facebook - https://www.facebook.com/History Twitter - https://twitter.com/history HIS
From playlist Pearl Harbor Day 2017 | History
Bet You Didn't Know: Bet You Didn't Know App | History
The Bet You Didn't Know app from HISTORY offers a unique look at human civilization with an exclusive collection of surprising and fascinating facts. HISTORY®, now reaching more than 98 million homes, is the leading destination for award-winning original series and specials that connect v
From playlist Bet You Didn't Know | History
History of the Holidays: History of Veterans Day | History
A look at the history of the holiday honoring those who fought for America, both living and dead. HISTORY®, now reaching more than 98 million homes, is the leading destination for award-winning original series and specials that connect viewers with history in an informative, immersive, an
From playlist History Celebrates Veteran's Day
8. Toward a 1D Device Model, Part II: Material Fundamentals
MIT 2.627 Fundamentals of Photovoltaics, Fall 2011 View the complete course: http://ocw.mit.edu/2-627F11 Instructor: Joseph T. Sullivan This lecture covers material properties affecting performance, including minority carrier diffusion length, minority carrier lifetime and mobility, recom
From playlist MIT 2.627 Fundamentals of Photovoltaics, Fall 2011
16. Solar Cell Characterization
MIT 2.627 Fundamentals of Photovoltaics, Fall 2011 View the complete course: http://ocw.mit.edu/2-627F11 Instructor: Tonio Buonassisi This lecture is about methods to characterize solar cell performance and properties, specifically techniques to measure short circuit current losses, open
From playlist MIT 2.627 Fundamentals of Photovoltaics, Fall 2011
UNSW Solar photoconductance decay (Sinton) minority carrier lifetime measurements
The effective minority carrier lifetime of a silicon sample is the average time that photo-generated electron-hole pairs exist before recombination. A high minority carrier lifetime is critical for achieving a high solar cell efficiency, and consequently, it is essential to measure this cr
From playlist UNSW Photovoltaic Technology and Manufacturing
LASER Frequency Response Part 2 - Photon Rate Equation
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From playlist Optoelectronic and Photonic Devices
Pearl Harbor Veterans on the Price of Freedom | History
In honor of Veterans Day, survivors of the 1941 Pearl Harbor attacks share their insight on war, sacrifice, and remembering their fallen comrades.#VeteransDay Subscribe for more HISTORY: http://histv.co/SubscribeHistoryYT Newsletter: https://www.history.com/newsletter Website - http://ww
From playlist History Celebrates Veteran's Day
LASER Below Threshold Explained
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From playlist Optoelectronic and Photonic Devices
LASER Frequency Response Introduction
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From playlist Optoelectronic and Photonic Devices
Photoconductors and Photoconductive Gain
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From playlist Optoelectronic and Photonic Devices
LASER Above Threshold Explained
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From playlist Optoelectronic and Photonic Devices
LASER Frequency Response Part 3 - Carrier Dynamics
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From playlist Optoelectronic and Photonic Devices
LASER Near Threshold Explained
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From playlist Optoelectronic and Photonic Devices
Pearl Harbor: The Last Word - The Attack on Pearl Harbor: The Second Wave | History
As they struggled to recover their injured and dead comrades, Pearl Harbor servicemen endured a second wave of attacks. Newsletter: https://www.history.com/newsletter Website - http://www.history.com Facebook - https://www.facebook.com/History Twitter - https://twitter.com/history HISTOR
From playlist Pearl Harbor Day 2017 | History