Synthesis of indano[60]fullerene thioketone and its application in organic solar cells oleh Yong-Chang Zhai, Shimon Oiwa, Shinobu Aoyagi, Shohei Ohno, Tsubasa Mikie, Jun-Zhuo Wang, Hirofumi Amada, Koki Yamanaka, Kazuhira Miwa, Naoyuki Imai, Takeshi Igarashi, Itaru Osaka, Yutaka Matsuo