Influence of cathode oxidation via the hole extraction layer in polymer:fullerene solar cells

On the stability of a variety of organic photovoltaic devices by IPCE and in situ IPCE analyses – the ISOS-3 inter-laboratory collaboration

“…The main difference with the NREL device described before is the replacement of the PEDOT:PSS layer by a thin MoO 3 layer, which is well known to confer better stability towards ambient atmosphere (especially humidity). 54 Although the hygroscopic PEDOT:PSS is known to be catastrophic for organic solar cells, [44][45][46] we should keep in mind that semiconductor oxides like ZnO and MoO 3 can also be sensitive to moisture. [47][48][49][50][51] In fact, semiconductor oxides are used as humidity sensors 50,51 and thus the ambient atmosphere also exerts an important effect on the IMEC devices.…”

Improved efficiency of P3HT:PCBM solar cells by incorporation of silver oxide interfacial layer

“…21 Moreover, the acidic and hygroscopic nature of PEDOT:PSS can result in degraded device performance. 22,23 Metal oxides like MoOx, VOx, NiOx, and WOx have been used as a substitute to PEDOT: PSS; however, these metal oxides form rough interfaces which can result in degraded device performances. [24][25][26] In this work, OSC devices with a AgOx interfacial layer added in between the ITO and PEDOT:PSS and their properties are investigated.…”

High shunt resistance in polymer solar cells comprising a MoO3 hole extraction layer processed from nanoparticle suspension

“…1͒ due to its acidic and hygroscopic nature. [5][6][7] A frequently employed strategy to solve this issue is to invert the layer sequence. Inverted architectures find PEDOT:PSS sandwiched between the organic semiconductor and a more stable back electrode, such as Ag or Au.…”

“…15 Various groups have shown that comparable device performance and increased lifetime can be achieved with evaporated MoO 3 ͑eMoO 3 ͒ as PEDOT: PSS replacement. 5,9,11 From the perspective of large scale production, the frequently employed vacuum process for deposition and the limited layer thickness are two major disadvantages of MoO 3 . 5 Recently, solution processed MoO 3 layers from precursor solution 11 as well as from a commercially available nanoparticle dispersion 15 were reported.…”

“…5,9,11 From the perspective of large scale production, the frequently employed vacuum process for deposition and the limited layer thickness are two major disadvantages of MoO 3 . 5 Recently, solution processed MoO 3 layers from precursor solution 11 as well as from a commercially available nanoparticle dispersion 15 were reported. Especially the layers deposited from nanoparticle dispersion appear attractive, since they offer electronic properties comparable to eMoO 3 , while keeping the advantage of low temperaure solution deposition they offer electronic properties comparable to eMoO 3 temperature deposition ͑max.…”