| 초록 |
An inkjet printing among these printing techniques has been extensively demonstrated with attractive advantages regarding high registration accuracy of direct writing in targeted active area without unnecessary waste of functional materials. The 3% of highefficiency in inkjet printed organic bulk heterojunction solar cell using P3HT:PCBM composite ink in mixed solution of 68% of ortho-dichlorobenzene (oDCB) and 32% of mesitylene has been recently reported.3 However, although a high boiling ink formulation with oDCB or its mixed solvent was irresistibly applied to prevent vaporization of the solvent at the nozzle orifice, its use seems to be hard to control the morphology of BHJ film on PEDOT:PSS underlayer compared to that spin-cast. This paper presents that direct writing of P3HT:PCBM composite in BHJ solar cell can be efficiently addressed by inkjet printing technology using conventional chlorobenzene ink solution. |
