Electron-Selective Self-Assembled Monolayers in Organic Photoelectrochemical Cells
발표자
이의민 (UNIST)
연구책임자
조한희 (UNIST)
초록
내용
Self-assembled monolayers (SAMs) have attracted considerable attention as charge-selective interfacial layers, offering alternatives to conventional metal oxide-based charge transporting layers (CTLs) in semiconductor optoelectronic devices such as photoelectrochemical cells and solar cells. While hole-selective SAMs have been extensively investigated, the development of electron-selective SAMs has seldom been demonstrated mainly due to the scarcity of suitable molecular backbones and the relatively moderate magnitude of dipole moments. Herein, we present a series of naphthalimide-based electron-selective SAMs for organic photoanodes. These SAMs exhibit large molecular dipole moments, which enables effective modulation of the FTO work function and facilitates electron extraction. Consequently, our SAM-based organic photoanodes demonstrate high performance and operational stability for solar water oxidation in the absence of any metal oxide CTLs.