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Related Concept Videos

P-N junction01:11

P-N junction

1.8K
A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...
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Related Experiment Video

Updated: Apr 20, 2026

Morphology Control for Fully Printable Organic–Inorganic Bulk-heterojunction Solar Cells Based on a Ti-alkoxide and Semiconducting Polymer
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High-efficiency large-bandgap material for polymer solar cells.

Hedi Wei1, Yi-Hsiang Chao, Chong Kang

  • 1Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing, 100875, China.

Macromolecular Rapid Communications
|November 26, 2014
PubMed
Summary

A novel conjugated polymer, HD-PDFC-DTBT, was synthesized for efficient polymer solar cells (PSCs). This material achieved a 7.39% power conversion efficiency, demonstrating its potential in renewable energy applications.

Keywords:
conjugated polymersdonor materialssolar cellswide-bandgap materials

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Area of Science:

  • Organic electronics
  • Materials science
  • Renewable energy

Background:

  • Conjugated polymers are crucial for organic electronics.
  • Developing high-performance donor-acceptor polymers is key for efficient polymer solar cells (PSCs).
  • Tuning polymer structure impacts electronic properties and device performance.

Purpose of the Study:

  • To synthesize and characterize a novel high-molecular-weight conjugated polymer, HD-PDFC-DTBT.
  • To investigate the performance of HD-PDFC-DTBT in inverted polymer solar cells (PSCs).
  • To evaluate the structure-property relationships influencing photovoltaic performance.

Main Methods:

  • Suzuki polycondensation was employed for polymer synthesis.
  • The polymer's optoelectronic properties, including bandgap and hole mobility, were measured.
  • Inverted polymer solar cells (PSCs) were fabricated using HD-PDFC-DTBT:PC71 BM active layers.

Main Results:

  • The synthesized polymer, HD-PDFC-DTBT, exhibits a large bandgap of 1.96 eV.
  • High hole mobility of 0.16 cm(2) V(-1) s(-1) was achieved for HD-PDFC-DTBT.
  • The HD-PDFC-DTBT:PC71 BM based inverted PSCs demonstrated a power conversion efficiency (PCE) of 7.39%.

Conclusions:

  • The novel conjugated polymer HD-PDFC-DTBT shows promising performance for PSC applications.
  • The material's properties, including high hole mobility and suitable bandgap, contribute to efficient solar energy conversion.
  • Further optimization of polymer structure and device architecture could lead to even higher efficiencies.