The University of Osaka · Engineering
Professor Shreyam Chatterjee's research lab specializes in the design and synthesis of novel organic and hybrid materials for advanced energy applications, with a strong focus on organic photovoltaics, thermoelectric materials, and functional nanocomposites. The lab explores the development of nonfullerene acceptors, electron-deficient heterocycles like NTz and FNTz, and supramolecular architectures to enhance optoelectronic properties. Key research directions include tuning molecular and supramolecular morphology, controlling charge transport mechanisms, and engineering nanomaterials such as polypyrrole–zinc oxide composites and bismuth-based oxide glasses for improved performance in solar cells and thermoelectric devices.
Figures are computed from collected data and may differ slightly.
Poly(3-hexylthiophene) (P3HT) is a promising donor for the large-scale organic solar cell fabrication in a cost-effective way. A series of nonfullerene acceptors compatible with P3HT are summarized in this review.
The development of nonfullerene acceptor materials applicable to organic photovoltaics (OPVs) has attracted considerable attention for the achievement of a high power conversion efficiency (PCE) in recent years. However, it is still challenging due to the insufficiency of both the variety of effective electron‐deficient units and certain guidelines for the design of such materials. This work focusses on naphtho[1,2‐ c :5,6‐ c ′]bis[1,2,5]thiadiazole (NTz) as a key electron‐deficient unit. Theref
Polypyrrole (PPy)–zinc oxide (ZnO) nanocomposites (PZ1, PZ2 and PZ3) are prepared by polymerizing pyrrole (1.3 × 10−6 mol) in the presence of various amounts of ZnO nanoparticles (NPs) (25, 100, 250 mg) in a lauric acid (LA)–cetyl trimethyl ammonium bromide (CTAB) coacervate gel template. PPy formed in the gel template has a nanorod morphology, but it gradually changes exhibiting an open nanotube (nanochannel) morphology in the PZ3 sample, although ZnO has a nanosphere morphology. PPy nanorod fo
Tuning the supramolecular morphology of an equimolar complex of riboflavin and melamine by the in situ formation of different size silver nanoparticles, affecting the photoluminescence property.
Electrical conductivity and thermoelectric power (TEP) of the as-quenched and annealed (at 500 \ifmmode^\circ\else\textdegree\fi{}C for 10 h and 840 \ifmmode^\circ\else\textdegree\fi{}C for 24 h) ${\mathrm{Bi}}_{4\ensuremath{-}n}{\mathrm{Pb}}_{n}{\mathrm{Sr}}_{3}{\mathrm{Ca}}_{3}{\mathrm{Cu}}_{4}{\mathrm{O}}_{x} (x=0\ensuremath{-}1.0)$ glasses have been measured. The dc conductivity data of the as-quenched and the partially annealed (at 500 \ifmmode^\circ\else\textdegree\fi{}C) glasses can be ex
The incorporation of electron-accepting units into π-conjugated systems is well-established as a powerful approach to tune the physical properties and frontier orbital energy levels of molecules. To realize semiconductors with novel functions, naphtho[1,2-c:5,6-c’]bis[1,2,5]thiadiazole (NTz) has been utilized as an effective electron-accepting unit. To enhance the electron-accepting nature of NTz in this work, the synthesis of fluorinated naphthobisthiadiazole (FNTz) was accomplished by the sequ
Replacement of the TiO2 layer in a traditional dye sensitized solar cell (DSC) by poly[3-(2-hydroxyethyl)-2,5-thienylene] grafted reduced graphene oxide (PHET-g-rGO) yields an overall power conversion efficiency of 3.06% with the N-719 dye, where the rGO part increases the charge mobility by reducing the backward recombination reaction in the DSC.
Organic solar cells (OSCs) based on poly(3-hexylthiophene) (P3HT) and nonfullerene acceptors (NFAs) have attracted steadily increasing attention due to their potential for large-scale preparation at low cost. However, irrespective of the demand for an environmentally sustainable nonhalogenated process, P3HT/NFA-based OSCs fabricated using a nonhalogenated solvent are still limited due to unclear strategies for controlling the properties of the blend film. Here, to investigate the influence of ac
The development of new electron-accepting π-conjugated systems for application as nonfullerene acceptors in organic solar cells (OSCs) is urgently needed. Although π-conjugated systems based on naphtho[1,2-<i>c</i>:5,6-<i>c</i>']bis[1,2,5]thiadiazole (<b>NTz</b>) and naphthalimide (<b>Np</b>) as central and terminal units, respectively, represent possible candidates for nonfullerene acceptors, our knowledge of the structure-property-device performance relationship of these compounds remains limi
Development of new semiconducting materials has become an important subject to develop organic photovoltaics. In this letter, new electron-accepting π-conjugated molecules, which are composed of thiophene-linked benzothiadiazole (T-BTz) as a central unit and phthalimide (PI) or naphthalimide (NI) as a terminal unit, were designed and synthesized to investigate the influence of the terminal units on the properties and photovoltaic characteristics. The utilization of NI led to red-shifted absorpti
Green-light wavelength-selective organic solar cells (GLWS-OSCs) utilize green-light for energy conversion and transmitted red and blue light for crop growth, potentially addressing key challenges for the energy supply in the greenhouses. Towards scaling up GLWS-OSCs via environmentally friendly process, fabrication the active layer using non-halogenated solvent process is essential. Here, we investigated the combination of poly(3-hexylthiophene) (P3HT) as a donor with nonfullerene acceptors (FB
The progress of organic solar cells (OSCs) largely depends on the development of nonfullerene acceptors (NFAs) based on electron-accepting π-conjugated compounds. Therefore, the creation of its building unit is important to tune the properties and increase the OSC performance. In this contribution, a new electron-accepting building unit, fluoranthenedione (FDO), was designed by extending the π-conjugation of representative indene-1,3-dione (IDO) framework. The electron-accepting π-conjugated com
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