High Efficiency Perovskite Solar Cells Exceeding 22% via a Photo-Assisted Two-Step Sequential Deposition

Lee, Dong GeonSungkyunkwan Univ, Sch Adv Mat Sci & Engn, Suwon 16419, South Korea. (författare)

One of the most effective methods to achieve high-performance perovskite solar cells (PSCs) is to employ additives as crystallization agents or to passivate defects. Tri-iodide ion has been known as an efficient additive to improve the crystallinity, grain size, and morphology of perovskite films. However, the generation and control of this tri-iodide ion are challenging. Herein, an efficient method to produce tri-iodide ion in a precursor solution using a photoassisted process for application in PSCs is developed. Results suggest that the tri-iodide ion can be synthesized rapidly when formamidinium iodide (FAI) dissolved isopropyl alcohol (IPA) solution is exposed to LED light. Specifically, the photoassisted FAI-IPA solution facilitates the formation of fine perovskite films with high crystallinity, large grain size, and low trap density, thereby improving the device performance up to 22%. This study demonstrates that the photoassisted process in FAI dissolved IPA solution can be an alternative strategy to fabricate highly efficient PSCs with significantly reduced processing times.

Kim, Dong HoeSejong Univ, Dept Nanotechnol & Adv Mat Engn, 209 Neungdong Ro, Seoul 05006, South Korea. (författare)
Lee, Jae MyeongSungkyunkwan Univ, Sch Adv Mat Sci & Engn, Suwon 16419, South Korea. (författare)
Kim, Byeong JoUppsala universitet,Fysikalisk kemi(Swepub:uu)byeki230 (författare)
Kim, Jun YoungSungkyunkwan Univ, Sch Adv Mat Sci & Engn, Suwon 16419, South Korea. (författare)
Shin, Seong SikKorea Res Inst Chem Technol, Div Adv Mat, 141 Gajeong Ro, Daejeon 34114, South Korea. (författare)
Jung, Hyun SukSungkyunkwan Univ, Sch Adv Mat Sci & Engn, Suwon 16419, South Korea. (författare)
Sungkyunkwan Univ, Sch Adv Mat Sci & Engn, Suwon 16419, South Korea.Sejong Univ, Dept Nanotechnol & Adv Mat Engn, 209 Neungdong Ro, Seoul 05006, South Korea. (creator_code:org_t)

Av författaren/redakt...: Lee, Dong Geon; Kim, Dong Hoe; Lee, Jae Myeong; Kim, Byeong Jo; Kim, Jun Young; Shin, Seong Sik; visa fler...; Jung, Hyun Suk; visa färre...

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