Patent ID: 7544312

Claim:
An electronic device comprising at least one layer comprising a triarylmethane derivative having Formula I, wherein: Ar 1 can be the same or different at each occurrence and is selected from the group consisting of aryl and heteroaryl; R 1 is the same or different at each occurrence and is selected from the group consisting of H, alkyl, heteroalkyl, aryl, heteroaryl, arylalkylene, heteroarylalkylene, arylalkylene, heteroarylalkylene, C n H a F b , and C 6 H c F d , or adjacent R 1 groups can be joined to form 5- or 6-membered rings; X can be the same or different at each occurrence and is selected from the group consisting of H, alkenyl, alkynyl, N(R 1 ) 2 , OC 6 H c F d , CN, COOR 1 , NO2 a fused heterocyclic ring, and OH, where at least one X is not H; n is an integer from 1 through 12, and a, b, c, and d are 0 or an integer, such that a+b=2n+1, and c+d=5, with the proviso that when X 5 Ar 1 is p-methylphenylene, R 1 is not ethyl, wherein the device is selected from the group consisting of a light-emitting diode, a light-emitting electrochemical cell, and a photodetector.