MoOx and V2Ox as hole and electron transport layers through functionalized intercalation in normal and inverted organic optoelectronic devices

Xinchen Li; Fengxian Xie; Shaoqing Zhang; Jianhui Hou; Wallace CH Choy

doi:10.1038/lsa.2015.46

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MoO_x and V₂O_x as hole and electron transport layers through functionalized intercalation in normal and inverted organic optoelectronic devices

Original Articles

- MoO_x and V₂O_x as hole and electron transport layers through functionalized intercalation in normal and inverted organic optoelectronic devices
- Light: Science & Applications Vol. 4, Issue 2, (2015)
- Affiliations：
  
  1.Department of Electrical and Electronic Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, China
  2.Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- Author bio：
  
  Wallace CH Choy, Department of Electrical and Electronic Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, China Email: chchoy@eee.hku.hk
- Funds：
- DOI：10.1038/lsa.2015.46
  CLC：
- Published：2015-06，
  
  Published Online：15 January 2015，
  
  Received：29 August 2014，
  
  Revised：18 December 2014，
  
  Accepted：13 January 2015
- Accepted：
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Li, X. C. et al. MoO_x and V₂O_x as hole and electron transport layers through functionalized intercalation in normal and inverted organic optoelectronic devices. Light: Science & Applications, 4, e273 (2015).
DOI：

Li, X. C. et al. MoO_x and V₂O_x as hole and electron transport layers through functionalized intercalation in normal and inverted organic optoelectronic devices. Light: Science & Applications, 4, e273 (2015). DOI： 10.1038/lsa.2015.46.

摘要

Abstract

To achieve fabrication and cost competitiveness in organic optoelectronic devices that include organic solar cells (OSCs) and organic light-emitting diodes (OLEDs)

it is desirable to have one type of material that can simultaneously function as both the electron and hole transport layers (ETLs and HTLs) of the organic devices in all device architectures (i.e.

normal and inverted architectures). We address this issue by proposing and demonstrating Cs-intercalated metal oxides (with various Cs mole ratios) as both the ETL and HTL of an organic optoelectronic device with normal and inverted device architectures. Our results demonstrate that the new approach works well for widely used transition metal oxides of molybdenum oxide (MoO

) and vanadium oxide (V

). Moreover

the Cs-intercalated metal-oxide-based ETL and HTL can be easily formed under the conditions of a room temperature

water-free and solution-based process. These conditions favor practical applications of OSCs and OLEDs. Notably

with the analyses of the Kelvin Probe System

our approach of Cs-intercalated metal oxides with a wide mole ratio range of transition metals (Mo or V)/Cs from 1∶0 to 1∶0.75 can offer significant and continuous work function tuning as large as 1.31 eV for functioning as both an ETL and HTL. Consequently

our method of intercalated metal oxides can contribute to the emerging large-scale and low-cost organic optoelectronic devices.

关键词

Keywords

metal oxides carrier transport layersnormal and inverted device architecturesorganic light-emitting diodesorganic solar cellsroom-temperature solution process

references

Mihailetchi VD, Koster LJ, Hummelen JC, Blom PW. Photocurrent generation in polymer-fullerene bulk heterojunctions.Phys Rev Lett2004;93: 216601..

Koster LJ, Smits EC, Mihailetchi VD, Blom PW. Device model for the operation of polymer/fullerene bulk heterojunction solar cells.Phys Rev B2005;72: 085205..

Peet J, Kim JY, Coates NE, Ma WL, Moses Det al. Efficiency enhancement in low-bandgap polymer solar cells by processing with alkane dithiols.Nat Mater2007;6: 497–500..

He Z, Zhong C, Su S, Xu M, Wu Het al. Enhanced power-conversion efficiency in polymer solar cells using an inverted device structure.Nat Photonics2012;6: 591–595..

You J, Dou L, Yoshimura K, Kato T, Ohya Ket al. A polymer tandem solar cell with 10.6% power conversion efficiency.Nat Commun2013;4: 1446..

Reineke S, Lindner F, Schwartz G, Seidler N, Walzer Ket al. White organic light-emitting diodes with fluorescent tube efficiency.Nature2009;459: 234–238..

Zheng H, Zheng Y, Liu N, Ai N, Wang Qet al. All-solution processed polymer light-emitting diode displays.Nat Commun2013;4: 1971..

Zhang Q, Li B, Huang S, Nomura H, Tanaka Het al. Efficient blue organic light-emitting diodes employing thermally activated delayed fluorescence.Nat Photonics2014;8: 326–332..

Cao Y, Yu G, Parker ID, Heeger AJ. Ultrathin layer alkaline earth metals as stable electron-injecting electrodes for polymer light emitting diodes.J Appl Phys2000;88: 3618–3623..

Shrotriya V, Li G, Yao Y, Chu CW, Yang Y. Transition metal oxides as the buffer layer for polymer photovoltaic cells.Appl Phys Lett2006;88: 073508..

Li G, Chu CW, Shrotriya V, Huang J, Yang Y. Efficient inverted polymer solar cells.Appl Phys Lett2006;88: 253503..

Han S, Shin WS, Seo M, Gupta D, Moon SJet al. Improving performance of organic solar cells using amorphous tungsten oxides as an interfacial buffer layer on transparent anodes.Org Electron2009;10: 791–797..

Stubhan T, Li N, Luechinger NA, Halim SC, Matt GJet al. High fill factor polymer solar cells incorporating a low temperature solution processed WO3hole extraction layer.Adv Energy Mater2012;2: 1433–1438..

Ratcliff EL, Meyer J, Steirer KX, Garcia A, Berry JJet al. Evidence for near-surface NiOOH species in solution-processed NiOx selective interlayer materials: impact on energetics and the performance of polymer bulk heterojunction photovoltaics.Chem Mater2011;23: 4988–5000..

Garcia A, Welch GC, Ratcliff EL, Ginley DS, Bazan GCet al. Improvement of interfacial contacts for new small-molecule bulk-heterojunction organic photovoltaics.Adv Mater2012;24: 5368–5373..

de Jong MP, van IJzendoorn LJ, de Voigt MJA. Stability of the interface between indium-tin-oxide and poly(3, 4-ethylenedioxythiophene)/poly(styrenesulfonate) in polymer light-emitting diodes.Appl Phys Lett2000;77: 2255–2257..

Wong KW, Yip HL, Luo Y, Wong KY, Lau WMet al. Blocking reactions between indium-tin oxide and poly (3, 4-ethylene dioxythiophene): poly(styrene sulphonate) with a self-assembly monolayer.Appl Phys Lett2002;80: 2788–2790..

Ionescu-Zanetti C, Mechler A, Carter SA, Lal R. Semiconductive polymer blends: correlating structure with transport properties at the nanoscale.Adv Mater2004;16: 385–389..

Kim JY, Kim SH, Lee HH, Lee K, Ma Wet al. New Architecture for high-efficiency polymer photovoltaic cells using solution-based titanium oxide as an optical spacer.Adv Mater2006;18: 572–576..

Wang J, Polleux J, Lim J, Dunn B. Pseudocapacitive contributions to electrochemical energy storage in TiO2(anatase) nanoparticles.J Phys Chem C2007;111: 14925–14931..

Gilot J, Barbu I, Wienk MM, Janssen RAJ. The use of ZnO as optical spacer in polymer solar cells: theoretical and experimental study.Appl Phys Lett2007;91: 113520..

Sun Y, Seo JH, Takacs CJ, Seifter J, Heeger AJ. Inverted polymer solar cells integrated with a low-temperature-annealed sol–gel-derived ZnO film as an electron transport layer.Adv Mater2011;23: 1679–1683..

Kyaw AKK, Wang DH, Wynands D, Zhang J, Nguyen TQet al. Improved light harvesting and improved efficiency by insertion of an optical spacer (ZnO) in solution-processed small-molecule solar cells.Nano Lett2013;13: 3796–3801..

Trost S, Zilberberg K, Behrendt A, Riedl T. Room-temperature solution processed SnOxas an electron extraction layer for inverted organic solar cells with superior thermal stability.J Mater Chem2012;22: 16224–16229..

Tan Za, Zhang W, Cui C, Ding Y, Qian Det al. Solution-processed vanadium oxide as a hole collection layer on an ITO electrode for high-performance polymer solar cells.Phys Chem Chem Phys2012;14: 14589–14595..

Wang F, Xu Q, Tan Z, Qian D, Ding Yet al. Alcohol soluble titanium(IV) oxide bis(2, 4-pentanedionate) as electron collection layer for efficient inverted polymer solar cells.Org Electron2012;13: 2429–2435..

Xie F, Choy WCH, Wang C, Li X, Zhang Set al. Low-temperature solution-processed hydrogen molybdenum and vanadium bronzes for an efficient hole-transport layer in organic electronics.Adv Mater2013;25: 2051–2055..

Tan Za, Qian D, Zhang W, Li L, Ding Yet al. Efficient and stable polymer solar cells with solution-processed molybdenum oxide interfacial layer.J Mater Chem A2013;1: 657–664..

Li X, Choy WCH, Xie F, Zhang S, Hou J. Room-temperature solution-processed molybdenum oxide as a hole transport layer with Ag nanoparticles for highly efficient inverted organic solar cells.J Mater Chem A2013;1: 6614–6621..

Hadipour A, Müller R, Heremans P. Room temperature solution-processed electron transport layer for organic solar cells.Org Electron2013;14: 2379–2386..

Park MH, Li JH, Kumar A, Li G, Yang Y. Doping of the metal oxide nanostructure and its influence in organic electronics.Adv Funct Mater2009;19: 1241–1246..

Bolink HJ, Brine H, Coronado E, Sessolo M. Phosphorescent hybrid organic–inorganic light-emitting diodes.Adv Mater2010;22: 2198–2201..

Sessolo M, Bolink HJ. Hybrid organic–inorganic light-emitting diodes.Adv Mater2011;23: 1829–1845..

Park SY, Kim BJ, Kim K, Kang MS, Lim KHet al. Low-temperature, solution-processed and alkali metal doped ZnO for high-performance thin-film transistors.Adv Mater2012;24: 834–838..

Liu J, Shao S, Fang G, Meng B, Xie Zet al. High-efficiency inverted polymer solar cells with transparent and work-function tunable MoO3–Al composite film as cathode buffer layer.Adv Mater2012;24: 2774–2779..

Brine H, Sánchez-Royo JF, Bolink HJ. Ionic liquid modified zinc oxide injection layer for inverted organic light-emitting diodes.Org Electron2013;14: 164–168..

Jiang X, Wong FL, Fung MK, Lee ST. Aluminum-doped zinc oxide films as transparent conductive electrode for organic light-emitting devices.Appl Phys Lett2003;83: 1875–1877..

Murdoch GB, Hinds S, Sargent EH, Tsang SW, Mordoukhovski Let al. Aluminum doped zinc oxide for organic photovoltaics.Appl Phys Lett2009;94: 213301..

Douvas AM, Vasilopoulou M, Georgiadou DG, Soultati A, Davazoglou Det al. Sol–gel synthesized, low-temperature processed, reduced molybdenum peroxides for organic optoelectronics applications.J Mater Chem C2014;2: 6290–6300..

Soultati A, Douvas AM, Georgiadou DG, Palilis LC, Bein Tet al. Solution-processed hydrogen molybdenum bronzes as highly conductive anode interlayers in efficient organic photovoltaics.Adv Energy Mater2014;4: 1300896.

Huang Y, Guo X, Liu F, Huo L, Chen Yet al. Improving the ordering and photovoltaic properties by extendingπ-conjugated area of electron-donating units in polymers with D–A structure.Adv Mater2012;24: 3383–3389..

Becker H, Spreitzer H, Kreuder W, Kluge E, Schenk Het al. Soluble PPVs with enhanced performance—a mechanistic approach.Adv Mater2000;12: 42–48..

Mihailetchi VD, Blom PWM, Hummelen JC, Rispens MT. Cathode dependence of the open-circuit voltage of polymer: fullerene bulk heterojunction solar cells.J Appl Phys2003;94: 6849–6854..

Greiner MT, Helander MG, Tang WM, Wang ZB, Qiu Jet al. Universal energy-level alignment of molecules on metal oxides.Nat Mater2012;11: 76–81..

Liao HH, Chen LM, Xu Z, Li G, Yang Y. Highly efficient inverted polymer solar cell by low temperature annealing of Cs2CO3interlayer.Appl Phys Lett2008;92: 173303..

Campoy-Quiles M, Ferenczi T, Agostinelli T, Etchegoin PG, Kim Yet al. Morphology evolutionviaself-organization and lateral and vertical diffusion in polymer: fullerene solar cell blends.Nat Mater2008;7: 158–164..

Xu Z, Chen LM, Yang G, Huang CH, Hou Jet al. Vertical phase separation in poly(3-hexylthiophene): fullerene derivative blends and its advantage for inverted structure solar cells.Adv Funct Mater2009;19: 1227–1234..

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