Sumitomo Chemical

About: Sumitomo Chemical is a company organization based out in Tokyo, Japan. It is known for research contribution in the topics: Alkyl & Alkoxy group. The organization has 9503 authors who have published 11628 publications receiving 122255 citations.

A polymer tandem solar cell with 10.6% power conversion efficiency

Abstract: An effective way to improve polymer solar cell efficiency is to use a tandem structure, as a broader part of the spectrum of solar radiation is used and the thermalization loss of photon energy is minimized. In the past, the lack of high-performance low-bandgap polymers was the major limiting factor for achieving high-performance tandem solar cell. Here we report the development of a high-performance low bandgap polymer (bandgap 60% and spectral response that extends to 900 nm, with a power conversion efficiency of 7.9%. The polymer enables a solution processed tandem solar cell with certified 10.6% power conversion efficiency under standard reporting conditions (25 °C, 1,000 Wm(-2), IEC 60904-3 global), which is the first certified polymer solar cell efficiency over 10%.

An Efficient Triple‐Junction Polymer Solar Cell Having a Power Conversion Efficiency Exceeding 11%

Abstract: Tandem solar cells have the potential to improve photon conversion efficiencies (PCEs) beyond the limits of single-junction devices. In this study, a triple-junction tandem design is demonstrated by employing three distinct organic donor materials having bandgap energies ranging from 1.4 to 1.9 eV. Through optical modeling, balanced photon absorption rates are achieved and, thereby, the photo-currents are matched among the three subcells. Accordingly, an efficient triple-junction tandem organic solar cell can exhibit a record-high PCE of 11.5%.

Connector with plural housings accommodated in a casing

Abstract: A connector has an auxiliary housing ( 10 ) with cavities ( 11 ) and locks ( 14 ) cantilevered into the cavities ( 11 ). The locks ( 14 ) deform into deformation permitting spaces (S) during insertion of terminal fittings ( 12 ) into the cavities ( 11 ). The locks ( 14 ) resiliently return to an undeflected condition to engage locking holes ( 12 a ) in terminal fittings ( 12 ) after insertion to proper depth. Deformation restricting portions ( 58 ) are integrally provided in an accommodation recess ( 53 ) of a housing main body ( 50 ) for accommodating the auxiliary housing ( 10 ). The deformation restricting portions ( 58 ) enter the deformation permitting spaces (S) for the locks ( 14 ) as the auxiliary housing ( 10 ) is accommodated into the accommodation recess ( 53 ), thereby preventing the locks ( 14 ) from inadvertently undergoing an elastic deformation.

Process for producing oxime

Abstract: A process for producing an oxime is provided, wherein the process comprises the step of reacting a ketone, hydrogen peroxide and ammonia in the presence of a crystalline titanosilicate having MWW structure under the condition that the ammonia concentration in the liquid portion of the reaction mixture is about 1% by weight or more. By the process, an ammoximation reaction of the ketone can be carried out with a high conversion of the ketone and a high selectivity to the oxime corresponding to the ketone, thereby producing the oxime with a high yield.