{"id":5126,"date":"2024-07-04T18:22:36","date_gmt":"2024-07-04T16:22:36","guid":{"rendered":"https:\/\/remade-project.eu\/?post_type=tribe_events&p=5126"},"modified":"2024-12-18T17:58:40","modified_gmt":"2024-12-18T16:58:40","slug":"polymer-under-ionizing-radiation-an-evolution-towards-recycling","status":"publish","type":"tribe_events","link":"https:\/\/remade-project.eu\/index.php\/event\/polymer-under-ionizing-radiation-an-evolution-towards-recycling\/","title":{"rendered":"Swift heavy ion irradiation puts InGaN\/GaN multi-quantum wells on the way for efficient green light emission"},"content":{"rendered":"
Zoom webinar<\/a> | Replay on Youtube<\/a><\/h5>\n

 <\/p>\n

Mamour Sall, <\/strong><\/p>\n

CIMAP (CEA, CNRS, ENSICAEN, Univ. Caen), France<\/p>\n

The nitride semiconductors, (Al,Ga,In) N present remarkable optical and electronic properties. They have been widely used for optoelectronic applications with high-efficiency blue light-emitting diodes (LEDs)
\nbased on InGaN\/GaN multiple quantum well (MQW) structures [1]. Emission at higher wavelength, for instance in the green, could be obtained by increasing the concentration of indium but with a strong
\nquantum-confined Stark effect due to piezoelectric polarization [2]. To mitigate this effect, we created atomic intermixing at the InGaN\/GaN MQW by using Swift Heavy Ion (SHI) irradiation. The resulting
\nchemical composition gradient has been suggested to improve the MQW emission efficiency [3].
\nThrough a careful combination of well-chosen energies SHI irradiation and low temperature thermal treatment, either during or after irradiation, we successfully created a compositional gradient at the MQWs
\ninterfaces while preserving the material luminescence.<\/p>\n

References:
\n[1] S. Nakamura et al., Japanese J. Appl. Physics, Part 2 Lett., vol. 35, no. 1 B, p. L74, Jan. 1996
\n[2] S. P. Denbaars et al., Acta Mater., vol. 61, no. 3, pp. 945\u2013951, Feb. 2013
\n[3] K. P. O\u2019Donnell et al., Phys. Status Solidi – Rapid Res. Lett., vol. 6, no. 2, pp. 49\u201352, 2012<\/p>\n","protected":false},"excerpt":{"rendered":"

Zoom webinar | Replay on Youtube   Mamour Sall, CIMAP (CEA, CNRS, ENSICAEN, Univ. Caen), France The nitride semiconductors, (Al,Ga,In) N present remarkable optical and electronic properties. 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