New material, 1000x more sensitive than silicon

http://media.ntu.edu.sg/NewsReleases...ail.aspx?news=
863947f9-972d-42d2-947f-3f437f6c3877

"... The new sensor made from graphene, is believed to be the first to
be able to detect broad spectrum light, from the visible to mid-
infrared, with high photoresponse or sensitivity. This means it is
suitable for use in all types of cameras, including infrared cameras,
traffic speed cameras, satellite imaging and more.

Not only is the graphene sensor 1,000 times more sensitive to light than
current low-cost imaging sensors found in today?s compact cameras, it
also uses 10 times less energy as it operates at lower voltages. ..."

This could push the high ISO levels to 1 million - 10 million.
--

Alfred Molon
------------------------------
Olympus E-series DSLRs and micro 4/3 forum at
http://tech.groups.yahoo.com/group/MyOlympus/
http://myolympus.org/ photo sharing site

In article , Alfred
Molon wrote:

http://media.ntu.edu.sg/NewsReleases...ail.aspx?news=
863947f9-972d-42d2-947f-3f437f6c3877

"... The new sensor made from graphene, is believed to be the first to
be able to detect broad spectrum light, from the visible to mid-
infrared, with high photoresponse or sensitivity. This means it is
suitable for use in all types of cameras, including infrared cameras,
traffic speed cameras, satellite imaging and more.

Not only is the graphene sensor 1,000 times more sensitive to light than
current low-cost imaging sensors found in today?s compact cameras, it
also uses 10 times less energy as it operates at lower voltages. ..."

This could push the high ISO levels to 1 million - 10 million.

no it won't. that's not possible. don't fall for the hype and sloppy
reporting.

http://www.dpreview.com/forums/thread/3496509
Follow the links that the your links link to. It all comes back to
this "new" graphene sensor being 10-20 times more sensitive than
existing graphene sensors, which had yet to exceed an ISO of 1 at the
time Qijie made his press release.

On Monday, June 3, 2013 7:36:16 PM UTC+1, Alfred Molon wrote:
http://media.ntu.edu.sg/NewsReleases...ail.aspx?news=

863947f9-972d-42d2-947f-3f437f6c3877



"... The new sensor made from graphene, is believed to be the first to

be able to detect broad spectrum light, from the visible to mid-

infrared, with high photoresponse or sensitivity. This means it is

suitable for use in all types of cameras, including infrared cameras,

traffic speed cameras, satellite imaging and more.



Not only is the graphene sensor 1,000 times more sensitive to light than
current low-cost imaging sensors found in today?s compact cameras, it
also uses 10 times less energy as it operates at lower voltages. ..."

I read about this on a geek site.

One of the geeks said:
"They claim 1000 times better sensitivity than CMOS, which people seem to be swallowing hook line
and sinker, however since there are plenty of current CMOS sensors with a Quantum Sensitiviy (QE)
of 60% to 80% for visible light, how exactly will the convert 1000 times more efficiently than that?
1000 times less loss would take them from 80% to 99.99%, that thats only actually 20% better...

I would imagine they are measuring at an extreme wavelength that existing CMOS sensors do not target,
hardly an advantage for the applications being discussed in the article (normal cameras).

Even quite boring consumer cameras have a QE of 20% to 40%.."

Source is here http://goo.gl/wnDfh


DanP

In article , DanP
says...

On Monday, June 3, 2013 7:36:16 PM UTC+1, Alfred Molon wrote:
http://media.ntu.edu.sg/NewsReleases...ail.aspx?news=

863947f9-972d-42d2-947f-3f437f6c3877



"... The new sensor made from graphene, is believed to be the first to

be able to detect broad spectrum light, from the visible to mid-

infrared, with high photoresponse or sensitivity. This means it is

suitable for use in all types of cameras, including infrared cameras,

traffic speed cameras, satellite imaging and more.



Not only is the graphene sensor 1,000 times more sensitive to light than
current low-cost imaging sensors found in today?s compact cameras, it
also uses 10 times less energy as it operates at lower voltages. ..."

I read about this on a geek site.

One of the geeks said:
"They claim 1000 times better sensitivity than CMOS, which people seem to be swallowing hook line
and sinker, however since there are plenty of current CMOS sensors with a Quantum Sensitiviy (QE)
of 60% to 80% for visible light, how exactly will the convert 1000 times more efficiently than that?
1000 times less loss would take them from 80% to 99.99%, that thats only actually 20% better...

I would imagine they are measuring at an extreme wavelength that existing CMOS sensors do not target,
hardly an advantage for the applications being discussed in the article (normal cameras).

Even quite boring consumer cameras have a QE of 20% to 40%.."

Source is here http://goo.gl/wnDfh

I know about these QE values. BTW, the boring consumer cameras (and
DSLRs as well) are below 30% QE. The 60-80% QE values are for back-
illuminated sensors.

I'm not an expert and assuming that the scientists in Singapore are not
lying, a possible explanation could be standard silicon sensors even if
they capture a photon and generate an electron somehow lose this
electron, while the graphene sensors do not. Just guessing however.
--

Alfred Molon
------------------------------
Olympus E-series DSLRs and micro 4/3 forum at
http://tech.groups.yahoo.com/group/MyOlympus/
http://myolympus.org/ photo sharing site

In article ,
Alfred Molon wrote:

In article , DanP
says...

On Monday, June 3, 2013 7:36:16 PM UTC+1, Alfred Molon wrote:
http://media.ntu.edu.sg/NewsReleases...ail.aspx?news=

863947f9-972d-42d2-947f-3f437f6c3877



"... The new sensor made from graphene, is believed to be the first to

be able to detect broad spectrum light, from the visible to mid-

infrared, with high photoresponse or sensitivity. This means it is

suitable for use in all types of cameras, including infrared cameras,

traffic speed cameras, satellite imaging and more.



Not only is the graphene sensor 1,000 times more sensitive to light than
current low-cost imaging sensors found in today?s compact cameras, it
also uses 10 times less energy as it operates at lower voltages. ..."

I read about this on a geek site.

One of the geeks said:
"They claim 1000 times better sensitivity than CMOS, which people seem to
be swallowing hook line
and sinker, however since there are plenty of current CMOS sensors with a
Quantum Sensitiviy (QE)
of 60% to 80% for visible light, how exactly will the convert 1000 times
more efficiently than that?
1000 times less loss would take them from 80% to 99.99%, that thats only
actually 20% better...

I would imagine they are measuring at an extreme wavelength that existing
CMOS sensors do not target,
hardly an advantage for the applications being discussed in the article
(normal cameras).

Even quite boring consumer cameras have a QE of 20% to 40%.."

Source is here http://goo.gl/wnDfh

I know about these QE values. BTW, the boring consumer cameras (and
DSLRs as well) are below 30% QE. The 60-80% QE values are for back-
illuminated sensors.

I'm not an expert and assuming that the scientists in Singapore are not
lying, a possible explanation could be standard silicon sensors even if
they capture a photon and generate an electron somehow lose this
electron, while the graphene sensors do not. Just guessing however.

Visible light is a tiny sliver of the spectrum that behaves like light
so they're probably making claims based on bandwidth. Monocrystaline
solar cells sometimes produce significant amounts of power in what
appears to be near darkness because they're using IR light that
penetrates thick clouds and radiates intensely from dimmed incandescent
bulbs.
--
I will not see posts from Google because I must filter them as spam

Alfred Molon wrote:

I know about these QE values. BTW, the boring consumer cameras (and
DSLRs as well) are below 30% QE. The 60-80% QE values are for back-
illuminated sensors.

http://www.clarkvision.com/articles/...mance.summary/
Canon 1DMII QE: 38%
Canon 10D QE: 26%
Details:
http://www.clarkvision.com/articles/...hotons.and.qe/

So DSLRs can be well above 30% QE (green) on the sensor side.

I'm not an expert and assuming that the scientists in Singapore are not
lying, a possible explanation could be standard silicon sensors even if
they capture a photon and generate an electron somehow lose this
electron, while the graphene sensors do not. Just guessing however.

Can't be.

-Wolfgang