Efficient and Reproducible CH3NH3PbI3 Perovskite Layer Prepared Using a Binary Solvent Containing a Cyclic Urea Additive
- 주제(키워드) perovskite , photovoltaics , urea additive , intermediate phase , solar cells
- 주제(기타) Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
- 설명문(일반) [Xie, Lin; Kim, Kyungkon] Ewha Womans Univ, Dept Chem & Nano Sci, Seoul 120750, South Korea; [Cho, An-Na; Park, Nam-Gyu] Sungkyunkwan Univ, Sch Chem Engn, Suwon 440746, South Korea; [Cho, An-Na; Park, Nam-Gyu] Sungkyunkwan Univ, Dept Energy Sci, Suwon 440746, South Korea
- 등재 SCIE, SCOPUS
- 발행기관 AMER CHEMICAL SOC
- 발행년도 2018
- URI http://www.dcollection.net/handler/ewha/000000151759
- 본문언어 영어
- Published As http://dx.doi.org/10.1021/acsami.7b18761
초록/요약
An efficient CH3NH3PbI3 perovskite solar cell whose performance is reproducible and shows reduced dependence on the processing conditions is fabricated using the cyclic urea compound 1,3-dimethyl-2-imidazolidinone (DMI) as an additive to the precursor solution of CH3NH3PbI3. X-ray diffraction analysis reveals that DMI weakly coordinates with PbI2 and forms a CH3NH3PbI3 film (film-DMI) with no intermediate phase. The surface of annealed film-DMI (film-DMI-A) was smooth, with an average crystal size of 1 cm. Photoluminescence and transient photovoltage measurements show that film-DMI-A exhibits a longer carrier lifetime than a CH3NH3PbI3 film prepared using the strongly coordinating additive dimethyl sulfoxide (DMSO) (film-DMSO-A) because of the reduced number of defect sites in film-DMI-A. A solar cell based on film-DMI-A exhibits a higher power conversion efficiency (17.6%) than that of a cell based on film-DMSO-A (15.8%). Furthermore, the performance of the film-DMI-A solar cell is less sensitive to the ratio between PbI2 and DMI, and film-DMI can be fabricated under a high relative humidity of 55%.
more