Evaporable Fullerene Indanones with Controlled Amorphous Morphology as Electron Transport Layers for Inverted Perovskite Solar Cells.

Fullerenes are among the most commonly used electron-transporting materials (ETMs) in inverted perovskite solar cells (IPSCs). Although versatile functionalized fullerene derivatives have shown excellent performance in IPSCs, pristine [60]fullerene (C60) is still the most widely used in devices mainly because of its uniform morphology by thermal deposition. However, thermally evaporable fullerene derivatives have not yet been achieved. Herein, we developed a series of evaporable fullerene derivatives, referred to as fullerene indanones (FIDOs), affording IPSCs with high power conversion efficiency (PCE) and long-term storage stability. The FIDOs were designed with a unique architecture in which the fullerene moiety and a benzene ring moiety are linked via a five-membered carbon ring in benzene ring plane. This molecular arrangement affords exceptional thermal stability, allowing the FIDOs to withstand harsh thermal deposition conditions. Moreover, by manipulating the steric bulk of the functional groups, we could control the state of the organic film from crystalline to amorphous. Subsequently, we used FIDOs as an electron transport layer (ETL) in IPSCs. Thanks to the suitable energy level and dual-passivation effect of FIDOs compared with a reference ETL using C60, the device using FIDOs achieved an open-circuit voltage of 1.16 V and a fill factor of 0.77. As a result, the PCE reached 22.11%, which is superior to 20.45% of the best-performing reference device. Most importantly, the FIDO-based IPSC devices exhibited exceptional stability in comparison to the reference device due to the stability of the amorphous ETL films.

Prophetic educational values in the Indonesian language textbook: pillars of positive politeness and character education.

Strengthening character education and positive politeness is an important pillar in selecting textbooks and teaching materials in global era. This study aimed to identify and describe the prophetic education values in Indonesian language textbooks for the VII grade junior high school in their relation to positive politeness to build students' character. The research question is "how are the values of prophetic education as a pillar of politeness and character education in textbooks?". Descriptive qualitative method was employed as the main approach. Data were collected through documentation using read-marker and noting techniques, and analyzed using heuristic and Grice's means-end politeness methods. Furthermore, the data were analyzed using content and comparative document analysis and sharpened by referential pragmatic politeness analysis. The research findings showed several interrelated prophetic education values in relation with the pillars of positive politeness and character education. These values formed the self-sufficiency of students in the Indonesian language textbook of class VII junior high school. They were manifested in the reality oriented to humanization, liberation, and transcendence. Humanization was realized through social life based on the generosity, honesty, tolerance, and politeness values. Similarly, liberation was realized through the education, health, mutual help, and hard work values. Moreover, transcendent life was actualized according to the consistency (istiqamah) in worshipping Allah (swt), gratitude, and humility (tawadhu') values. This study recommends that prophetic values can be used as a pillar of politeness development and strengthening educational characters in global era.

Aerobic Toluene Oxidation Catalyzed by Subnano Metal Particles.

Subnanocatalysts (SNCs) containing various noble metals (Cu, Ru, Rh, Pd, or Pt) with sizes of approximately 1 nm were synthesized using dendritic poly(phenylazomethine)s as a macromolecular template. These materials exhibit high catalytic performance during toluene oxidation without the use of harmful solvents or explosive oxidants, resulting in the formation of valuable organic products, including benzoic acid as the major product. In particular, Pt19 SNC with a narrow particle size distribution exhibits extraordinary catalytic activity, with a turnover frequency of 3238 atom-1 h-1 , which is 1700 times greater than that obtained by commercial Pt/C catalysts.

Controlling of 6 nm sized and 10 nm pitched dot arrays ordered along narrow guide lines using PS-PDMS self-assembly.

We have studied graphoepitaxy to make nanodots or nanolines ordered along electron beam (EB)-drawn resist guide using block copolymers (BCPs) of polystyrene-polydimethylsiloxane (PS-PDMS). We found out that the number n of ordered molecular dot arrays in the line gap increases stepwise with the gap between guide lines. The n self-assembled dot arrays were ordered in a gap between n and n+1 times the mean PDMS pitch and self-assembled with no guide pattern. According to the ordering characteristics, 6 nm sized and 10 nm pitched PDMS dot arrays were formed using the BCP self-assembly with the guide lines.