Sumitomo Chemical Company, Limited

Katsuhiro Suenobu

Ken Yoshimura

Takashi Kamikawa

Noriyuki Hida

Mio Shiratori

Seiji Oda

Ken Kashima

Mayuko Sugiyama

A block copolymer includes an end group, a block that binds to the end group, and a block that does not bind to the end group. The block that does not bind to the end group contains at least one non-crosslinkable constitutional unit represented by the formula (X) and/or at least one non-crosslinkable constitutional unit represented by the formula (Z). At least one of formulas (i) X>X, (ii) Z>Zand (iii) X+Z>X+Zis satisfied when the total number of non-crosslinkable constitutional units represented by formulas (X) and (Z) in the block that does not bind to the end group are represented by Xand Z, respectively, and the total number of non-crosslinkable constitutional units represented by formulas (X) and (Z) in the block that binds to the end group are represented by Xand Z, respectively.

Block copolymer and light emitting device using the same

The present invention provides a photovoltaic cell having a large short-circuit current density and a large photoelectric conversion efficiency. This photovoltaic cell comprises: 

Photovoltaic cell

A dihalobiphenyl compound represented by the formula (1): wherein A represents an amino group substituted with one or two C1-C20 hydrocarbon groups or a C1-C20 alkoxy group, Rrepresents a fluorine atom, a C1-C20 alkyl group, etc., Xrepresents a chlorine atom, a bromine atom or an iodine atom, an k represents an integer of 0 to 3, anda polyarylene comprising a repeating unit represented by the formula (2): wherein A, Rand k represent the same meanings as defined above.

Polyarylene and process for producing the same

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Tsukuba, Japan

Katsuhiro Suenobu