Journal ArticleDOI
Electrochemical Considerations for Determining Absolute Frontier Orbital Energy Levels of Conjugated Polymers for Solar Cell Applications
Reads0
Chats0
TLDR
Narrow bandgap conjugated polymers in combination with fullerene acceptors, as well as the values used for the absolute potentials of standard electrodes, can complicate the comparison of materials properties and determination of structure/property relationships.Abstract:
Narrow bandgap conjugated polymers in combination with fullerene acceptors are under intense investigation in the field of organic photovoltaics (OPVs). The open circuit voltage, and thereby the power conversion efficiency, of the devices is related to the offset of the frontier orbital energy levels of the donor and acceptor components, which are widely determined by cyclic voltammetry. Inconsistencies have appeared in the use of the ferrocenium/ferrocene (Fc + /Fc) redox couple, as well as the values used for the absolute potentials of standard electrodes, which can complicate the comparison of materials properties and determination of structure/property relationships.read more
Citations
More filters
Journal ArticleDOI
Dithienogermole As a Fused Electron Donor in Bulk Heterojunction Solar Cells
Chad M. Amb,Song Chen,Kenneth R. Graham,Jegadesan Subbiah,Cephas E. Small,Franky So,John R. Reynolds +6 more
TL;DR: The synthesis and bulk heterojunction photovoltaic performance of the first dithienogermole (DTG)-containing conjugated polymer is reported, with performance enhancement is a result of a higher short-circuit current and fill factor in the DTG-containing cells, which comes at the cost of a slightly lower open circuit voltage than for the DTS-based cells.
Journal ArticleDOI
Fe-Porphyrin-Based Metal–Organic Framework Films as High-Surface Concentration, Heterogeneous Catalysts for Electrochemical Reduction of CO2
Idan Hod,Matthew D. Sampson,Pravas Deria,Clifford P. Kubiak,Clifford P. Kubiak,Omar K. Farha,Omar K. Farha,Joseph T. Hupp,Joseph T. Hupp +8 more
TL;DR: In this article, electrophoretic deposition of thin films of an appropriately chosen metal-organic framework (MOF) material is an effective method for immobilizing the needed quantity of catalyst.
Journal ArticleDOI
Enhancing the Hole-Conductivity of Spiro-OMeTAD without Oxygen or Lithium Salts by Using Spiro(TFSI)2 in Perovskite and Dye-Sensitized Solar Cells
TL;DR: Gaining control of the conductivity of the HTM in both dye-sensitized and perovskite-absorber solar cells in an inert atmosphere using spiro(TFSI)2 is an important step toward the commercialization of these technologies.
Journal ArticleDOI
Highly Efficient Near-Infrared Delayed Fluorescence Organic Light Emitting Diodes Using a Phenanthrene-Based Charge-Transfer Compound.
TL;DR: The first NIR TADF molecule TPA-DCPP (TPA=triphenylamine; DCPP=2,3-dicyanopyrazino phenanthrene) which has a small singlet-triplet splitting (ΔEST ) of 0.13 eV is reported, which is comparable to the most-efficient deep-red/NIR phosphorescent OLEDs with similar electroluminescent spectra.
Journal ArticleDOI
Functional fullerenes for organic photovoltaics
TL;DR: In this article, the development of functional fullerenes as acceptors, electron selective layers, and morphology stabilizers for bulk heterojunction polymer solar cells is reviewed, and a wide variety of newly developed fullerene-derived molecules have appeared in the past few years and started to show very encouraging photovoltaic performance when they were blended with low bandgap conjugated polymers.
References
More filters
Journal ArticleDOI
Conjugated polymer-based organic solar cells
TL;DR: This review gives a general introduction to the materials, production techniques, working principles, critical parameters, and stability of the organic solar cells, and discusses the alternative approaches such as polymer/polymer solar cells and organic/inorganic hybrid solar cells.
Journal ArticleDOI
Design Rules for Donors in Bulk‐Heterojunction Solar Cells—Towards 10 % Energy‐Conversion Efficiency
Markus C. Scharber,David Mühlbacher,Markus Koppe,Patrick Denk,Christoph Waldauf,Alan J. Heeger,Christoph J. Brabec +6 more
TL;DR: In this article, the authors presented a review of several organic photovoltaics (OPV) technologies, including conjugated polymers with high-electron-affinity molecules like C60 (as in the bulk-heterojunction solar cell).
Journal ArticleDOI
For the Bright Future—Bulk Heterojunction Polymer Solar Cells with Power Conversion Efficiency of 7.4%
TL;DR: The past success in organic light-emitting diodes provides scientists with confidence that organic photovoltaic devices will be a vital alternate to the inorganic counterpart, and the easiness of the fabrication holds the promise of very low-cost manufacturing process.
Journal ArticleDOI
Chemical Redox Agents for Organometallic Chemistry
TL;DR: 1. Advantages and disadvantages of Chemical Redox Agents, 2. Reversible vs Irreversible ET Reagents, 3. Categorization of Reagent Strength.
Journal ArticleDOI
Polymer solar cells with enhanced open-circuit voltage and efficiency
Hsiang-Yu Chen,Hsiang-Yu Chen,Jianhui Hou,Shaoqing Zhang,Yongye Liang,Guanwen Yang,Yang Yang,Luping Yu,Yue Wu,Gang Li +9 more
TL;DR: In this article, the open-circuit voltage of polymer solar cells constructed based on the structure of a low-bandgap polymer, PBDTTT, can be tuned, step by step, using different functional groups.