Performance enhancement in inverted polymer photovoltaics with solution-processed MoOX and air-plasma treatment for anode modification

• Published in: Solar energy materials and solar cells Vol. 109; pp. 178 - 184
• Main Authors: Sun, Jen-Yu, Tseng, Wei-Hsuan, Lan, Shiang, Lin, Shang-Hong, Yang, Po-Ching, Wu, Chih-I, Lin, Ching-Fuh
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.02.2013; Elsevier
• Subjects: Anodic; Applied sciences; Deposition; Devices; Energy; Exact sciences and technology; Inverted structure; MoOX; Natural energy; Performance enhancement; Photovoltaic cells; Photovoltaic conversion; Plasma treatment; Polymer blends; Polymer photovoltaics; Solar cells; Solar cells. Photoelectrochemical cells; Solar energy; Solution-process; Polymer photovoltaics; Solution-process; Plasma treatment; Inverted structure; MoOX; Performance evaluation; Oxygen; Air treatment; Polymer blends; Anode; Plasma assisted processing; Molybdenum oxide; Polymer; High temperature; Organic solar cells; Molybdenum; Light emitting diode; Deposition process; MoOx; Manufacturing process; Fullerenes; Compatibility; Growth from solution
• ISSN: 0927-0248; 1879-3398
• DOI: 10.1016/j.solmat.2012.10.026

Molybdenum oxide (MoOX) has drawn increasing attention in organic photovoltaic cells due to the large performance enhancement achieved in organic light emitting diodes. In this work, we report on inverted polymer photovoltaics (PVs) with solution-processed MoOX as anodic modification to enhance the performance of PVs. MoO3 is reduced to MoOX with x<3 after air-plasma treatment and then plays a role more closely to the thermally deposited MoOX, whose oxygen ratio is reduced during high temperature deposition. The reduced oxygen ratio provides more effective transport, thus enhancing the JSC of the devices. The PCE of the device with solution-processed MoOX is then enhanced to over 4%, which is comparable to that of thermally deposited MoOX. As a result, this work provides good compatibility for deposition of solution-process MoOX on top of polymer:fullerene blends in inverted polymer PVs to achieve better performance. [Display omitted] ► PVs characteristics enhancement by solution-processed MoOX as anodic modification. ► Air-plasma treatment for advanced function of solution-processed MoOX. ► Comparable PCE performance to devices with thermally deposited MoOX.