| abstract |
Disclosed are compounds of formula I: In the formula, Y 1 and Y 2 are each independently selected from an optionally substituted amino group or an optionally substituted aryl group. Also disclosed are organic optoelectronic devices comprising donor-acceptor heterojunctions formed from one or more of the above squaraine compounds. A method of making the disclosed device is also disclosed, which can include one or more sublimation steps for depositing the squaraine compound. |