Enhancing the performance of organic solar cells and polymer light emitting diodes via a novel giant polyoxomolybdate bifunctional interlayer material

Qiu, J; Wang, Y; Wan, G; Bing, Z; Liu, H; Li, B; Yu, C; Zhu, J; Bradley, DDC; Huang, J; Wu, L; Li, F

Journal article

Enhancing the performance of organic solar cells and polymer light emitting diodes via a novel giant polyoxomolybdate bifunctional interlayer material

Abstract:: The giant polyoxomolybdate [(NH4)42[Mo72VIMo60VO372(CH3COO)30(H2O)72] {Mo132} has been little used for optoelectronic device applications. In this paper we demonstrate that thin films of {Mo132} and surfactant-encapsulated {Mo132}, namely {Mo132}-tetraoctyl ammonium (TOA) can, respectively, upshift and downshift the work functions of a variety of electrode materials, including Al, Ag and ITO, by forming suitable interface dipoles. {Mo132}-TOA used as a cathode interlayer (CIL) yields a power conversion efficiency of 18% for poly[(2,6-(4,8-bis(5-(2-ethylhexyl)-4-fluorothiophen-2-yl)-benzo[1,2-b:4,5-b’]dithiophene))-alt-(5,5-(1’,3’-di-2-thienyl-5’,7’-bis(2-ethylhexyl)benzo[1’,2’-c:4’,5’-c’]dithiophene-4,8-dione))] : 2,2’-((2Z,2’Z)-((12,13-bis(2-ethylhexyl)-3,9-(2-butyloctyl)-12,13-dihydro-[1,2,5]thiadiazolo[3,4-e]thieno[2”,3’‘:4’,5’]thieno[2’,3’:4,5]pyrrolo[3,2-g]thieno[2’,3’:4,5]thieno[3,2-b]indole-2,10-diyl)bis(methanylylidene))bis(5,6-difluoro-3-oxo-2,3-dihydro-1H-indene-2,1-diylidene)) dimalononitrile (PM6 : L8-BO) based organic solar cells (OSCs) and a current efficiency of 15.24 cd/A in Super Yellow based polymer light-emitting diodes. In addition, OSCs using both {Mo132} as anode interlayer (AIL) and {Mo132}-TOA as CIL provide improved stability relative to reference devices with traditional PEDOT:PSS as AIL and poly(9,9-bis(3’-(N,N-dimethyl)-N-ethylammoinium-propyl-2,7-fluorene)-alt-2,7-(9,9-dioctylfluorene))dibromide (PFN-Br) as CIL. {Mo132} thereby serves as an effective bifunctional interlayer material to optimize organic optoelectronic device performance, enhancing power conversion and light emission efficiencies and increasing lifetime.

Publication status:: Published

Peer review status:: Peer reviewed

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APA Style

Qiu, J., Wang, Y., Wan, G., Bing, Z., Liu, H., Li, B., Yu, C., Zhu, J., Bradley, D. D. C., Huang, J., Wu, L., & Li, F. (2026). Enhancing the performance of organic solar cells and polymer light emitting diodes via a novel giant polyoxomolybdate bifunctional interlayer material. Npj Clean Energy, 2(1).

MLA Style

Qiu, J, et al. “Enhancing the Performance of Organic Solar Cells and Polymer Light Emitting Diodes via a Novel Giant Polyoxomolybdate Bifunctional Interlayer Material.” Npj Clean Energy, vol. 2, no. 1, 2026.

Chicago Style

Qiu, J, Y Wang, G Wan, et al. 2026. “Enhancing the Performance of Organic Solar Cells and Polymer Light Emitting Diodes via a Novel Giant Polyoxomolybdate Bifunctional Interlayer Material.” Npj Clean Energy 2 (1).
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