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The dispiro-oxepine/dispiro-thiapine derivatives for optoelectronic semiconductors is a compound based on a structure having a functionalized dispiro compound of formula (Ia) or (Ib) with the core unit being a seven-membered heterocycle oxepine or thiapine, the derivative being formed by combining (Ia) or (Ib): with two moities selected from K1 and K2: The derivative is used as a hole transporting material in an optoelectronic and/or photoelectrochemical device.
Sophia Haussener, Isaac Thomas Holmes-Gentle, Roberto Valenza