Ultrathin TiO₂ Films on ZnO Electron-Collecting Layers of Inverted Organic Solar Cell

Enhanced Performance in Inverted Polymer Solar Cells with D–π–A‐Type Molecular Dye Incorporated on ZnO Buffer Layer

“…The neat ZnO layer showed a green fluorescence band centered at about 555 nm, which was mainly due to the presence of various defects as recombination centers either in the bulk or at the surface of the ZnO matrix. [29] The intensity of such defect sites was much reduced by treating the ZnO surface with dye. It appears that the surface defects of ZnO, such as surface hydroxyl groups or oxygen vacant sites, are passivated by carboxylate bonding of the organic dye to the ZnO surface, which suppresses the recombination of electron-hole pairs at such defects.…”

Zinc oxide: Conjugated polymer nanocomposite as cathode buffer layer for solution processed inverted organic solar cells

“…ITO electrode is therefore usually modified by a cathode buffer layer (CBL) to decrease the work function in inverted organic solar cells [9]. Commonly used CBLs include transparent metal oxides [10], water/alcohol soluble polyetherimide (PEI) derivatives [11], and conjugated polymer electrolytes (CPE) [12]. Among various metal oxides, ZnO is one of the most widely used CBL materials in organic solar cells because of its high electron mobility, high visible transparency, easy of fabrication, as well as environment friendly and excellent stability [13].…”

The role of a TiCl4 treatment on the performance of CdS quantum-dot-sensitized solar cells

“…[26,27]. The suppression of defectrelated photoluminescence by the TiO 2 -coating layer has been reported by several groups [28,29]. Other groups' work have shown that the growth of TiO 2 from gaseous TiCl 4 is initiated at the surface states such as oxygen vacancies or dangling bonds [30,31].…”