Novel Types of Dye-Sensitized and Perovskite-Based Tandem Solar Cells with a Common Counter Electrode

Thienopyrroledione-Based Photosensitizers as Strong Photoinduced Oxidants: Oxidation of Fe(bpy)32+ in a >1.3 V Dye-Sensitized Solar Cell

“…Strong photoinduced oxidants are valuable to a range of applications, including solar batteries, − solar-to-fuel devices, − solar-to-electric devices, − and chemical synthesis. , Generating a photoinduced oxidant via interfacial electron transfer to a semiconductor is attractive for many of these applications since interfacial charge separations are often dramatically longer lived than intramolecular charge transfers (milliseconds versus nanoseconds for many organic dyes). − Extending charge separation times is attractive for fundamental studies and for practical applications. The study of chromophores bound to metal oxide semiconductors using visible light to generate oxidants <∼1.0 V versus NHE are well-known through dye-sensitized solar cell and dye-sensitized photoelectrochemical cell literature; ,, however, systems significantly more positive in oxidation potential (>1.5 V versus NHE) are less frequently reported. , Designing chromophores that increase the oxidation potential is an important step toward enabling new visible light driven chemical transformations and using the full potential energy of early visible range photons to give larger potential energy separations of charge which are needed for high-voltage dye-sensitized solar cells (HV DSCs) and multijunction devices, such as sequential series multijunction dye-sensitized solar cells (SSM-DSCs). ,− …”

Very wide-bandgap nanostructured metal oxide materials for perovskite solar cells

“…The PSC fabrication process was provided under ambient conditions with high humidity (∼ 50 -60 %) using a one-step method described previously [15]. During the fabrication process, ZrO 2 -based photoelectodes were first coated with a photosensitive perovskite (CH 3 NH 3 PbI 3 ) layer, obtained from lead iodide and methylammonium iodide precursor solutions, followed by depositing a layer of spiro-MeO-TAD as a hole-transporting material [7,14]. The PSC fabrication process was completed by thermal evaporation of conductive Au contacts with a thickness of 50 nm using vacuum system VUP-4.…”

“…One of the key components of the PSC is an electron-conductive photoelectrode, which consists of metal oxide semiconductor nanoparticles organized in a mesoscopic architecture. Nanostructured layers of titanium dioxide (TiO 2 ) with the band gap (E g ) of 3.0 -3.2 eV are generally used as photoelectrodes in PSCs [7,8]. At the same time, some other wide-bandgap materials were also successfully used in photoelectrodes [9].…”

Pt nanoparticle-functionalized RGO counter electrode for efficient dye-sensitized solar cells

“…Most studies so far have been focused on matching the device absorption characteristics to solar spectrum and the enhancement of the light collection ability of DSCs by the use of tandem systems, quantum dots, and new type of dyes [4][5][6]. However, much efforts have been also devoted in developing a new generation of more effective and low-cost PEs and CEs.…”