期刊
ACS APPLIED MATERIALS & INTERFACES
卷 12, 期 22, 页码 24827-24836出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c05632
关键词
PEAI; bilateral interface engineering; high efficiency; long-term stability; perovskite solar cells
资金
- Global Frontier Program through the Global Frontier Hybrid Interface Materials (GFHIM) of the National Research Foundation of Korea (NRF) - Ministry of Science, ICT & Future Planning [2013M3A6 B1078874]
- New & Renewable Energy Core Technology Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) from the Ministry of Trade, Industry & Energy (MOTIE) of Republic of Korea [20193091010110]
- National Research Foundation of Korea [22A20131112367] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Achieving high efficiency and long-term device stability is a vital issue for the commercialization of organic-inorganic hybrid perovskite solar cells (PeSCs). In this work, phenylethylammonium iodide (PEAI)-induced bilateral interface engineering was developed to improve the device efficiency and stability of methylammonium lead triiodide (MAPbI(3))-based PeSCs. Introducing PEAI onto a poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) layer modifies the surface properties of PEDOT:PSS and facilitates the formation of a high-quality perovskite active layer with enlarged grains on PEDOT:PSS. PEA(+) in PEAI-PEDOT:PSS also alters the work function of PEDOT:PSS, leading to a reduction in the energy difference between the PEDOT:PSS and MAPbI(3) perovskite layers, which decreases the energy loss during charge transfer. Additionally, depositing PEAI onto three-dimensional (3D) perovskite yields a two-dimensional/three-dimensional (2D/3D) stacked structure for the perovskite active layer. Because the two-dimensional (2D) top layer acts as a capping layer to prevent water penetration, the stability of the perovskite active layer is significantly enhanced. A PeSC device fabricated based on this combination exhibits enhanced power conversion efficiency (PCE) and an extended device lifetime compared to a pristine PeSC. Under high-humidity conditions (75 +/- 5%), the PEAI-treated PeSC retains 88% of its initial power conversion efficiency (PCE) after 100 h. In contrast, a pristine PeSC device loses over 99% of its initial PCE after only 25 h under the same conditions.
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