Dissertation > Excellent graduate degree dissertation topics show

The Synthesis of Low Band-gap Organic Photovoltaic Materials and Its Application

Author: ZouWenWu
Tutor: JiaQingMing
School: Kunming University of Science and Technology
Course: Applied Chemistry
Keywords: polymer solar cells DTM conjugated polymers bulk-hetero junction cells power conversion efficience
CLC: TM914.4
Type: Master's thesis
Year: 2013
Downloads: 2
Quote: 0
Read: Download Dissertation


Solar energy is a renewable, cleanly, and inexhaustible energy, and fabricating solar cells can be a directly and effective method to utilize the solar energy. Polymer solar cells have attracted significant attentions due to their easy fabrication, low cost, light weight, large-area, flexibility on device and the polymer can be easily modified. In this thesis, systemmatic introduction was used to present the research of polymer solar cells. So far, some achievements was obtained, and the power conversion efficiency (PCE) of the cells were beyond8%, but some serious problem should be resolved, such as the mismatch of the absorption of polymer solar cells and the solar emission spectra, the short life of cells. We retrieve the polymer materials which absorption of solar spectra can be red-shift and broaden absorption. Solar cells were fabricated after blending with the PCBM acceptor as the active layer, and the corresponding power conversion efficiency were tested.1. Malonate used as strong withdrawing electron group was introduced into the side chain of the thiophene, and the dialkyl2-(thiophen-3-ylmethylene)malonate (DTM) were designed as the acceptor unit to cross-couppled with the donor to get the conjugated polymers with the donor-acceptor structure. The target polymers exhist thermal stability, deep-lying (high occupied molecular orbit (HOMO) energy level, and they were used as the donor blending with the [6,6]-phenyI-C-71-butyric acid methyl ester (PC71BM) to form the active layer of polymer cells, and among the series of polymers,the best performance of devices was P2, and its PCE was1.22%, with Voc of0.70V, Jscof4.5mA/cm2and FF of38.8%.2. Strong electron withdrawing acceptor unit,4,7-bis(5-bromothiophen-2-yl)-5,6-bis(octyloxy)(BBTBOBSDZ), was designed and synthesized. And it cross-coupled with the4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)benzo[1,2-b:4,5-b’]dithiophene (BEHTBDT) with the core, BDT, as the donor unit to obtain the alternative conjugated polymer P2, and the thermal properties, electro-chemical properties, and the polymer showed broad absorption spectra, which may match the solar emission spectra, resulting in better collection of solar energy. The bulk-hetero junction solar cells constituted with polymer used as the donor blending with the PC61BM as the acceptor were fabricated, and their photovoltaic properties were tested and the best performance of the devices was0.81%, blending with PC71BM as the active layer of the polymer solar cells.

Related Dissertations

  1. Synthesis and Photovoltaic Properties of Low-bandgap Polymers Based on N-arylcarbazole,O626.2
  2. The Research of Electrode Modification with Interface for Polymer Solar Cells,TM914.4
  3. Based on FDT / DTM technology equipment management systems research and development,TP311.52
  4. Polymer solar cell structure design and performance optimization,TM914.4
  5. Research on the Surface Plasmon-enhanced Organic Bulk Heterojunction Solar Cell,TM914.4
  6. Preparation of Conjugated Polymer/Fe2O3 Nanomaterial and Their Photocatalytic Properties,TB383.1
  7. Synthesis and Properties Design benzoxazole polymer photovoltaic materials,O631.3
  8. Characterization of photovoltaic devices based on P3HT and Optimization,TM914.4
  9. Studies on the Organic Solar Cells Based on SPFGraphene Oxide/P3HT,TM914.4
  10. Enhancement of the Performance and Stability of Polymer Photovoltaic Cells,TM914.4
  11. NURBS -based 3D terrain modeling research methods,P208
  12. Study on the Synthesis and Characterization of Regioregular 3-substituted Polythiophenes as Electron Donor in Polymer Solar Cell,O633.3
  13. Thiophene and benzo -based aromatic polyimide double conjugated polymer synthesis and properties of,O633.5
  14. Design, Synthesis and Structural Characterization of Novel Hyperbranched Poly(Phenylene Vinylene),O631.3
  15. Design, Synthesis, and Optoelectronic Properties of Novel Poly-(para-phenylene Vinylene) Derivates (PPVs),O632
  16. Synthesis and Characterization of the main chain conjugated polymers and ruthenium complexes containing bipyridine,O631.3
  17. The Insulated Molecular Wires Based on Water-soluble Conjugated Polymers: Synthesis and Characterization,TQ320.7
  18. The Manufacture and Electrical Properties Research of PANI/MWNT Composite Film,TB383.2
  19. Synthesis, Characterization, and Biosensing Applications of Cationic Water-Soluble Poly(aryleneethynylene)s,O631.3
  20. The Synthesis of Fluorene-based Polymer Containing Ethoxy and Optical Characterization,O631.3
  21. Synthesis and Photovoltaic Properties of the Thienyl Benzothiadiazole Organic Small-molecule and Copolymers Donor Materials,TM914.4

CLC: > Industrial Technology > Electrotechnical > Independent power supply technology (direct power) > Photocell > Solar cells
© 2012 www.DissertationTopic.Net  Mobile