title: Study on thermal evolution of the CuSe phase in nanoparticle-based absorber layers for solution-processed chalcopyrite photovoltaic devices.
abstract: Nanoparticle-based, solution-processed chalcopyrite photovoltaic devices have drawn tremendous attraction for the realization of low-cost, large-area solar cell applications. In particular, it has been recently demonstrated that the CuSe phase plays a critical role in allowing the formation of device-quality, nanoparticle-based chalcopyrite absorber layers. For further in-depth study, with the aim of understanding the thermal behavior of the CuSe phase that triggers the vigorous densification reaction, a requisite for high-performance chalcopyrite absorber layers, both multiphase (CuSe-phase including) and single-phase (CuSe-phase free) CISe nanoparticles are investigated from the viewpoint of compositional variation and crystalline structural evolution. In addition, with CuSe-phase including CISe particulate layers, the basic restrictions in thermal treatment necessary for activating effectively the CuSe-phase induced densification reaction are suggested, in conjunction with consideration on the thermal decomposition of organic additives that are inevitably incorporated in nanoparticle-based absorber layers.
authors.affiliation: Advanced Materials Division, Korea Research Institute of Chemical Technology, 141 Gajeongro, Yuseong, Daejeon 305-600, Korea.
authors.forename: Yeong-Hui
authors.initials: YH
authors.lastname: Seo
authors.forename: Byung-Seok
authors.initials: BS
authors.lastname: Lee
authors.forename: Yejin
authors.initials: Y
authors.lastname: Jo
authors.forename: Han-Gyeol
authors.initials: HG
authors.lastname: Kim
authors.forename: Kyoohee
authors.initials: K
authors.lastname: Woo
authors.forename: Jooho
authors.initials: J
authors.lastname: Moon
authors.forename: Youngmin
authors.initials: Y
authors.lastname: Choi
authors.forename: Beyong-Hwan
authors.initials: BH
authors.lastname: Ryu
authors.forename: Sunho
authors.initials: S
authors.lastname: Jeong