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A Simple and Cost Effective Method for Making Hole Transport Layer (HTL) Materials for Organic Electronics

A Simple and Cost Effective Method for Making Hole Transport Layer (HTL) Materials for Organic Electronics
Field
Advanced Materials
Patent
IP00437

Key Problem and Market Opportunity

  • The Hole Transport Layer (HTL) provides electron mobility in organic lighting devices (OLED). PEDOT:PSS is conventionally an ideal HTL material for testing OLED performance because it is highly electro-conductive and transparent in the visible light spectrum. However, PEDOT:PSS has limited lifetime for production environment due to its acidic property and causes corrosion of the ITO anode. 
  • Therefore, our materials can be a replacement for achieving longer lifetime for organic electronic devices without compromising its performance.

Key Advantages of the Technology

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  • Low-temperature one-step solution-process method for synthesizing transition metal oxides (TMOs) for HTL
  • Water-free process – enhance yield and lifetime
  • Tested with multiple TMOs. For instance, molybdenum oxide (MoO3), vanadium oxide (V2O5) and  tungsten oxide (WO3)

 

  MoO3 V2O5 WO3 PEDOT:PSS
Annealing temperature (10mins) 80°C 100°C 100°C 140°C
Open-circuit voltage for OSC (VOC) 0.625 V 0.625 V 0.489 V 0.633 V
Close-circuit current for OSC (JSC) (mA/cm2) 9.38 9.71 8.60 9.28
Fill Factor (FF) (%) 67.15 63.61 56.48 62.69
Power conversion efficiency 3.94% 3.86% 2.37% 3.68%

Photovoltaic parameters for organic solar cells (OSC) with TMOs and PEDOT:PSS (approximate values) 

Potential Product and Services

  • Hole Transport Materials for Organic Electronics (HTL) such as OLED and organic solar cell

Development status and IP Strength

  • US Patent no. 9540249
  • Chinese Patent no. ZL 201380046404.8
  • Broad protection for a wide selection of transition metal.
  • Device prototype is available in laboratory scale

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