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Naphthalene‐Diimide‐Based Ionenes as Universal Interlayers for Efficient Organic Solar Cells

Journal Article · · Angewandte Chemie (International Edition)
 [1];  [2];  [3];  [4];  [1]
  1. Beijing Advanced Innovation Center for Soft Matter Science and Engineering State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology Beijing 100029 China
  2. Polymer Science and Engineering Department University of Massachusetts Amherst 120 Governors Drive Amherst MA 01003 USA
  3. Polymer Science and Engineering Department University of Massachusetts Amherst 120 Governors Drive Amherst MA 01003 USA, Materials Sciences Division Lawrence Berkeley National Lab 1 Cyclotron Road Berkeley CA 94720 USA
  4. Beijing Advanced Innovation Center for Soft Matter Science and Engineering State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology Beijing 100029 China, Polymer Science and Engineering Department University of Massachusetts Amherst 120 Governors Drive Amherst MA 01003 USA, Materials Sciences Division Lawrence Berkeley National Lab 1 Cyclotron Road Berkeley CA 94720 USA
Abstract

Self‐doping ionene polymers were efficiently synthesized by reacting functional naphthalene diimide (NDI) with 1,3‐dibromopropane ( NDI‐NI ) or trans ‐1,4‐dibromo‐2‐butene ( NDI‐CI ) via quaternization polymerization. These NDI‐based ionene polymers are universal interlayers with random molecular orientation, boosting the efficiencies of fullerene‐based, non‐fullerene‐based, and ternary organic solar cells (OSCs) over a wide range of interlayer thicknesses, with a maximum efficiency of 16.9 %. NDI‐NI showed a higher interfacial dipole (Δ), conductivity, and electron mobility than NDI‐CI , affording solar cells with higher efficiencies. These polymers proved to efficiently lower the work function ( WF ) of air‐stable metals and optimize the contact between metal electrode and organic semiconductor, highlighting their power to overcome energy barriers of electron injection and extraction processes for efficient organic electronics.

Sponsoring Organization:
USDOE
OSTI ID:
1647416
Journal Information:
Angewandte Chemie (International Edition), Journal Name: Angewandte Chemie (International Edition) Journal Issue: 41 Vol. 59; ISSN 1433-7851
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

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