Optoelectronic Device Buffer Layer Dark Current Reduction

An inorganic buffer layer is introduced as an intermediary between the organic photoelectric conversion layer and the electrodes. This buffer layer mediates the interaction by providing a stable interface that prevents harmful effects from internal impurities in the organic material, thereby reducing dark current while maintaining the ease of manufacturing organic optoelectronic devices.

The device structure combines organic and inorganic materials to create a composite system. The photoelectric conversion layer uses organic materials for ease of manufacture, while the buffer layer uses inorganic materials to suppress dark current and improve sensitivity, achieving a synergistic effect that resolves the contradiction between manufacturing ease and device performance.

Instead of modifying the entire device structure, the solution applies a localized buffer layer only at the critical interface between the photoelectric conversion layer and the electrodes. This local intervention specifically addresses the dark current issue at the electrode interface without unnecessarily complicating other parts of the device.

The device is segmented into distinct functional layers with the buffer layer serving as a separate, dedicated component between the photoelectric conversion layer and electrodes. This segmentation allows the buffer layer to perform its specific function of reducing dark current independently, making the complexity manageable and the device structure modular.