Improving charge injection and charge transport in CuO-based p-type DSSCs – a quick and simple precipitation method for small CuO nanoparticles

Abstract

Novel CuO photocathodes based on synthesized nanoparticles achieve superior charge injection and transport properties in p-DSSCs.

Controlling Interfacial Charge Transfer and Fill Factors in CuO‐based Tandem Dye‐Sensitized Solar Cells

“…All of the aforementioned features make ZnPcs ideal for t‐DSSCs in combination with high‐energy absorbing ruthenium(II)‐based photosensitizers, such as N719 . Regarding the p‐type photocathodes we chose CuO as suitable material, since it shows less recombination with the I − /I 3 − redox couple and a faster charge transport compared to NiO‐based electrodes . Both are crucial for realizing high FFs .…”

“…[17] Regarding the p-type photocathodes we chose CuO as suitable material, since it shows less recombination with the I À /I 3 À redox couple and af aster charge transport compared to NiO-based electrodes. [18,19] Both are crucial for realizing high FFs. [20,21] To this end, we probed ZnPc3 and ZnPc4 as low-energy photosensitizers in CuO-based p-and t-DSSCs.I ti s, to our knowledge,t he first example of at -DSSC featuring dyesensitized photocathodes based on CuO.…”

“…State-of-the-art CuO nanoparticles were employed and the devices were filled with arecently optimized I À /I 3 À based electrolyte. [19,25] Figure 3s hows the current density versus voltage (J-V)c urves and the incident photon-to-current efficiency (IPCE) spectra, while the device figures-of-merit are summarized in Table S2. Reference devices,t hat is, ZnPc1/CuO,s howed a V oc of 99.1 mV,w hich increased to 104.0 and 117.8 mV for ZnPc3/CuO and ZnPc4/CuO,respectively.T he trend in J sc is,h owever, different:4 .14 mA cm À2 (ZnPc1), 2.74 mA cm À2 (ZnPc3), and 1.72 mA cm À2 (ZnPc4).…”

Synthesis of Highly Monodisperse Cu2O Nanocrystals and Their Applications as Hole‐Transporting Layers in Solution‐Processed Light‐Emitting Diodes

“…The precursor route involves coating of soluble metal precursors, followed by in situ treatment to convert the precursors into oxide films . The nanocrystal route consists of directly depositing colloidal Cu x O particles into thin films . The nanocrystal route decouples crystallization of oxides from film‐formation process, which offers more freedom in removing by‐products, regulating surface properties and controlling film‐formation temperature …”

“…[15][16][17] The nanocrystal routec onsists of directly depositing colloidal Cu x O particles into thin films. [18,19] The nanocrystal route decouples crystallization of oxidesf rom film-formation process, which offersm ore freedom in removing by-products, regulating surface properties and controlling film-formation temperature. [20,21] Various synthetic methods, including thermald ecomposition, [22,23] solvothermal, [18] sonochemistry [24] and post oxidation of colloidal Cu nanocrystals, [25] were developed to prepare col-loidalC u x Op articles.…”