“…Amongst organic materials, 7,7,8,8-tetracyanoquinodimethane (TCNQ)-based charge transfer salts, especially CuTCNQ have stimulated great enthusiasm owing to their peculiar electrical and optical features. [6][7][8][9][10][11][12] Between the two polymorphs of CuTCNQ, the highly conductive phase I 13 with a greater number of charge carriers has registered its potential value in functional nanoscale devices. Moreover, the emergence of CuTCNQ, which endows very low turn-on eld values owing to its low work function, has helped to draw substantial research attention to organic nanostructure-based cold cathode emitters.…”