The XXIst International Workshop on the Physics of Semiconductor Devices
(IWPSD 2021) is being jointly organized by the Indian Institute of Technology
Delhi and Solid State Physics Laboratory, Delhi in collaboration with Society
for Semiconductor Devices and Semiconductor Society (India). This series of
biennial workshops, started in 1981, provides a global forum for interaction
between scientists and technologists working in the area of semiconductor
materials and devices. The XXth workshop held in December 2019 was atte-
nded by about 500 delegates.