An Organic–Inorganic Hybrid Material Based on Benzo[ghi]perylenetri-imide and Cyclic Titanium-Oxo Cluster for Efficient Perovskite and Organic Solar Cells

Abstract

Perovskite and organic solar cells usually required electron-transport interlayers to efficiently transport electron from the photoactive layer to the metal electrode. In general, pure organic or inorganic materials are applied into the interlayers, but organicinorganic hybrid materials have been rarely reported for this application. In this work, we reported the first titanium-oxo cluster-based organic-inorganic hybrid material by introducing large π-conjugated benzo[ghi]perylenetriimides as organic part via a simple ligand exchange reaction. This new hybrid material showed excellent solubility, wellaligned energy levels and excellent electron mobilities, enabling its great potential application as interlayer in solar cells. Indeed, its application as interlayer in perovskite

Benzothiadiazole-Based Double-Cable Conjugated Polymers for Single-Component Organic Solar Cells with Efficiency over 4%

“…Although double-cable polymer-based SCOSCs have obtained significant progress in recent years, the PCEs are always lagging behind the two-component OSCs. − The crucial issue is to optimize the morphology to achieve nanophase separation between donor backbones and acceptor cable units, which requires the rational design of chemical structures. “Donor-acceptor” alternating conjugated polymers by using distinct electron-deficient segments have been widely used into high-performing bulk-heterojunction (BHJ) OSCs. − Among these electron-deficient units, benzothiadiazole (BT) has the advantages of easy synthesis and modification by the F atom and alkyloxy side chains. − BT-polymers have tunable absorption spectra and frontier energy levels, high crystallinity, and excellent charge transport properties. − BT-polymer-based BHJ OSCs have achieved PCEs of 14.4% (as an electron acceptor) and 18.2% (as an electron donor) .…”

Self‐Assembly Metal Chelate as Ultraviolet Filterable Interface Layer for Efficient Organic Solar Cells

“…According to the integer charge transfer model, the composite SnO 2 /Hf(ACBN) 4 film is energetically more suitable to form a favorable energy‐level alignment with the acceptors, which can decrease the energy barrier and contribute to the charge collection process at the cathode electrode to obtain higher V oc values in OSCs. [ 41–43 ] The electrical conductivities of SnO 2 , Hf(ACBN) 4 , and SnO 2 /Hf(ACBN) 4 were evaluated by the dark I – V characteristics of the devices with a structure of ITO/ ETLs/Ag, in which highly conductive ITO and Ag were used as electrodes to ensure good ohmic contact (Figure S6, Supporting Information). The electrical conductivity (σ) of the materials can be obtained according to the equation as follow: $$\[ \begin{array}{*{20}{c}}{\sigma = \frac{{{G_0}{d_0}}}{A}}\end{array} \]$$ G 0 (S) is the conductance acquired by the I–V curve slope, d 0 is the film thickness of ETLs, and A is the device area.…”

Hybrid Organic-Inorganic Materials and Interfaces With Mixed Ionic-Electronic Transport Properties: Advances in Experimental and Theoretical Approaches

“…The electronic interactions in h OI materials have been extensively studied particularly for sensing, energy storage and energy conversion applications ( Kumar et al, 2018 ; Singh et al, 2019 ; Duan et al, 2020 ; Niederhausen et al, 2021 ; Rathnayake et al, 2021 ; Zhang et al, 2021 ). The electronic interactions in these h OI materials and interfaces are mostly via proximity of the π -cloud of the organic phase with the inorganic surface, and thus Class I h OI materials are the most studied for these purposes.…”