| 초록 |
Since the spin-coating may cause solvent penetration into the underlying layer or damage to adjacent chemical species, an alternative process in required to overcome these limitations. The stamping-transfer process induces a stable morphology based on the dried film, thereby providing a countermeasure to prevent solvent penetration and damage to the underlying layer. In this research, we introduced the wetting coeficient to decied the probability of the transfer for the photoactive layer. On the basis of the wetting coefficient, we optimized the hydrophilic-PUA stamping mold, and demonstrated the stamping-transfer process successfully. The organic solar ells (OSCs) with stamping-transfer processed bulk-heterojunction (BHJ) shows improved electrical performance, promoted exciton quenching, and suppression of trap-density. Thus, the stamping-transfer process with the optimal mold can be a promising film formation process for effcient next-generation thin-film organic optoelectronics. |
