Enhancing the Durability and Carrier Selectivity of Perovskite Solar Cells Using a Blend Interlayer
SCIE
SCOPUS
- Title
- Enhancing the Durability and Carrier Selectivity of Perovskite Solar Cells Using a Blend Interlayer
- Authors
- Sin, D.H.; Jo, S.B.; Lee, S.G.; Ko, H.; Kim, M.; Lee, H.; Cho, K.
- Date Issued
- 2017-05
- Publisher
- American Chemical Society
- Abstract
- A mechanically and thermally stable and electron-selective ZnO/CH3NH3PbI3 interface is created via hybridization of a polar insulating polymer, poly(ethylene glycol) (PEG), into ZnO nanoparticles (NPs). PEG successfully passivates the oxygen defects on ZnO and prevents direct contact between CH3NH3PbI3 and defects on ZnO. A uniform CH3NH3PbI3 film is formed on a soft ZnO:PEG layer after dispersion of the residual stress from the volume expansion during CH3NH3PbI3 conversion. PEG also increases the work of adhesion of the CH3NH3PbI3 film on the ZnO:PEG layer and holds the CH3NH3PbI3 film with hydrogen bonding. Furthermore, PEG tailors the interfacial electronic structure of ZnO, reducing the electron affinity of ZnO. As a result, a selective electron-collection cathode is formed with a reduced electron affinity and a deep-lying valence band of ZnO, which significantly enhances the carrier lifetime (473 ��s) and photovoltaic performance (15.5%). The mechanically and electrically durable ZnO:PEG/CH3NH3PbI3 interface maintains the sustainable performance of the solar cells over 1 year. A soft and durable cathodic interface via PEG hybridization in a ZnO layer is an effective strategy toward flexible electronics and commercialization of the perovskite solar cells. ? 2017 American Chemical Society.
- Keywords
- Carrier lifetime; Defects; Electron affinity; Electronic structure; Electrons; Flexible electronics; Hydrogen bonds; Perovskite; Perovskite solar cells; Polyethylene glycols; Zinc oxide; Adhesive interfaces; Electron collections; Insulating polymer; Interfacial electronic structure; Photovoltaic performance; Selective interfaces; Sustainable performance; ZnO nanoparticles; Solar cells
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/50835
- DOI
- 10.1021/acsami.7b02349
- ISSN
- 1944-8244
- Article Type
- Article
- Citation
- ACS Applied Materials and Interfaces, vol. 9, no. 21, page. 18103 - 18112, 2017-05
- Files in This Item:
- There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.