Abdullah Uzum   Taiki Ashikaga   Takuma Noguchi   Hiroyuki Kanda   Hidehito Fukui   Tomitaro Harada   Seigo Ito   
MATERIALS RESEARCH EXPRESS 7(3) 2020年3月
Improvement of aluminum alloyed p + back surface fields (p + BSF) which is an essential requirement for achieving high efficiency silicon solar cells has been an important task. One of the ways to have better quality BSFs can be to introduce scree...
Eiichi Kobayashi   Shuhei Shimmura   Seigo Ito   Takayuki Makino   
JAPANESE JOURNAL OF APPLIED PHYSICS 59 2020年2月
A new optical anomaly has been found in photoreflectance spectra at temperatures above 250 K at spray-pyrolysis-deposited junctions composed of F-doped SnO2 and anatase TiO2 junctions. The energetic position of this anomaly at room temperature is ...
Ryuki Tsuji   Dmitry Bogachuk   Bin Luo   David Martineau   Eiji Kobayashi   Ryoto Funayama   Simone Mastroianni   Andreas Hinsch   Seigo Ito   
ELECTROCHEMISTRY 88(5) 418-422 2020年
Variations in the time courses of the activation of fully-printable carbon-based multi-porous-layered-electrode perovskite solar cells (MPLE-PSCs) can lead to differences between the photocurrent density (J(sc)) values obtained from one-sun photoc...
Naoyuki Shibayama   Hiroyuki Kanda   Tae Woong Kim   Hiroshi Segawa   Seigo Ito   
APL MATERIALS 7(3) 2019年3月 [査読有り]
In the inverted structure perovskite solar cells, a buffer layer is generally used at the interface between the n-type semiconductor layer and the metal electrode, but its design guidelines have not yet been established. Here, a series of inverted...