There is disclosed squaraine compounds of formula I: ##STR00001## wherein each of Y.sub.1 and Y.sub.2 is independently chosen from an optionally substituted amino group and an optionally substituted aryl group. Also described are organic optoelectronic devices comprising a Donor-Acceptor heterojunction that is formed from one or more of the squaraine compounds. A method of making the disclosed device, which may include one or more sublimation step for depositing said squaraine compound, is also disclosed.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH
 The subject matter of this application was prepared with U.S. Government support under Contract No. DE-FG36-08GO18022 awarded by U.S. Department of Energy, Center for Energy Nanoscience, and Contract Nos. DE-SC0001013 and DE-SC0000957. The government has certain rights in the subject matter of this application.