Yutaka Matsuo

A new solution-processable fabrication protocol using a soluble tetrabenzoporphyrin (BP) precursor and bis(dimethylphenylsilylmethyl)[60]fullerene (SIMEF) created three-layered p-i-n photovoltaic devices, in which the i-layer possesses a well-defined bulk heterojunction structure in which columnar BP crystals grow vertically from the bottom p-layer. The device showed a power conversion efficiency of 5.2% (V(OC) = 0.75 V; J(SC) = 10.5 mA/cm(2); FF = 0.65).

ADVERTISEMENT RETURN TO ISSUEPREVReviewNEXTSelective Multiaddition of Organocopper Reagents to FullerenesYutaka Matsuo† and Eiichi Nakamura*†‡View Author Information Nakamura Functional Carbon Cluster Project, ERATO, Japan Science and Technology Agency, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan, and Department of Chemistry, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan* To whom correspondence should be addressed. E-mail: [email protected]†Japan Science and Technology Agency.‡The

In this work, both anode and cathode interfaces of p‐i‐n CH 3 NH 3 PbI 3 perovskite solar cells (PVSCs) are simultaneously modified to achieve large open‐circuit voltage (V oc ) and fill factor (FF) for high performance semitransparent PVSCs (ST‐PVSCs). At the anode, modified NiO serves as an efficient hole transport layer with appropriate surface property to promote the formation of smooth perovskite film with high coverage. At the cathode, a fullerene bisadduct, C 60 (CH 2 )(Ind), with a shall

[structure: see text] Depending on the exact length of the tube, the chemical structure of finite-length armchair [n,n] single-wall carbon nanotube (n = 5 and 6) falls into three different classes that may be referred to as Kekulé, incomplete Clar, and complete Clar networks. The C-C bond lengths, nucleus-independent chemical shift analysis, and orbital energies suggest that the chemical reactivities of the finite-length tube change periodically as the tube length is elongated by one-by-one laye

Monoaddition of Grignard reagents, in particular tri(organo)silylmethylmagnesium chlorides, to [60]fullerene took place smoothly in the presence of dimethylformamide to produce (organo)(hydro)[60]fullerenes, C60R(1)H, in good yield (up to 93% isolated yield). The hydrofullerene was then deprotonated to generate the corresponding anion, C60R(-), which was then alkylated to obtain 58pi-electron di(organo)[60]fullerenes, C60R(1)R(2), in good to high yield (up to 93% overall yield). The two-step met

Abstract Double‐walled carbon nanotubes are between single‐walled carbon nanotubes and multiwalled carbon nanotubes. They are comparable to single‐walled carbon nanotubes with respect to the light optical density, but their mechanical stability and solubility are higher. Exploiting such advantages, solution‐processed transparent electrodes are demonstrated using double‐walled carbon nanotubes and their application to perovskite solar cells is also demonstrated. Perovskite solar cells which harve

Abstract This review article describes design concept, synthesis, and features of fullerene derivatives having high lowest unoccupied molecular orbital (LUMO) levels to achieve high open-circuit voltage in organic thin-film photovoltaic devices. Installation of organic electron-donating groups onto fullerene and decrease of the size of the fullerene π-electron-conjugated system raise the LUMO levels, affording high-performance organic solar cells. Addition of the methano group as the smallest ca

Hexagonal or tetragonal packing of columnar stacks in crystals and liquid crystals has been observed for a series of molecules possessing a fullerene apex and an aromatic cone that are connected with a Si-C connection. The columnar stacking of the new shuttlecock molecules is constitutionally stable but conformationally flexible due to the large cavity created on the top of the fullerene molecule.

Carbon-sandwiched perovskite solar cells have long-term stability and are low cost.

A series of conical molecules featuring a [60]fullerene/ferrocene hybrid and five aralkyl side chains (Fe[C60{C6H4-(OCO-C6H3-(OR)2-3,4)-4}5]Cp) have been synthesized and examined for their structural and electrochemical properties as well as their ability to form supramolecular structures in crystals and liquid crystals. When the R group on the side is a methyl group, the compound forms crystals in which the dipolar conical molecules are stacked head-to-tail to form a columnar structure. When th

Herein, we report use of [Li⁺ @C₆₀ ]TFSI^- as a dopant for spiro-MeOTAD in lead halide perovskite solar cells. This approach gave an air stability nearly 10-fold that of conventional devices using Li⁺ TFSI^- . Such high stability is attributed to the hydrophobic nature of [Li⁺ @C₆₀ ]TFSI^- repelling moisture and absorbing intruding oxygen, thereby protecting the perovskite device from degradation. Furthermore, [

Single-walled carbon nanotubes (CNTs) has been considered as a promising material for a top electrode of perovskite solar cells owing to its hydrophobic nature, earth-abundance, and mechanical robustness. However, its poor conductivity, a shallow work function, and nonreflective nature have limited further enhancement in power conversion efficiency (PCE) of top CNT electrode-based perovskite solar cells. Here, we introduced a simple and scalable method to address these issues by utilizing an ex-

Tridentate 2,5-bis(N-aryliminomethyl)pyrroles (1a, aryl = 4-methoxylphenyl; 1b, aryl = 4-methylphenyl; 1c, aryl = 2-methylphenyl; 1d, aryl = 2,6-dimethylphenyl; 1e, aryl = 2,6-diisopropylphenyl) have been prepared, and their reactions with a homoleptic Y{N(SiMe3)2}3 (2) have been investigated. The number of pyrrolyl ligands introduced to an yttrium atom can be controlled by varying the bulkiness of the ligand to give mono(pyrrolyl) (3), bis(pyrrolyl) (4), or tris(pyrrolyl) complexes (5) upon ami

2D perovskite-stabilized FACsPbI3 (FA = formamidinium) perovskite solar cells were fabricated in both normal-type and inverted-type architectures. While the normal-type devices exhibited a high power conversion efficiency of 20.2%, their reproducibility was limited. On the other hand, the inverted-type devices exhibited an efficiency of 18.2% with a greater stability and higher reproducibility than those of the normal-type devices. The reduced reproducibility of the normal-type devices was assoc

Adding a compact dihydromethano (CH2 ) group to a 58π-indene fullerene (C60 (Ind)) creates a 56π-electron dihydromethano/indene fullerene (C60 (CH2 )(Ind)) and raises the LUMO level with only a minimal increase in size. This class of compounds features reduced conjugation that raises the LUMO level, and a high electron mobility because of the small CH2 addend.