Posted by Vladimir Koifman on May 30, 2013 •
Image: Nanyang Technological University •
IEEE Spectrum: “Assistant Professor Wang Qijie from
Singapore’s Nanyang Technological University (NTU) presents a graphene image sensor that is said to be 1,000 times more sensitive to light than current imaging sensors found in today’s cameras. Apparently, this claim comes from a photoconductive gain of 1,000 achieved by the device. The new sensor is said to use 10 times less energy as it operates at lower voltages. When mass produced, graphene sensors are estimated to cost at least five times cheaper, not clear why.
Prof. Wang Qijie believes this to be the first time that a broad-spectrum, high photosensitive sensor has been developed using pure graphene. Prof Wang came up with an idea to create nanostructures on graphene which will “trap” light-generated electron particles for a much longer time, resulting in a much stronger electric signal.”