Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 11, Issue 51, Pages 48556-48563Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b17386
Keywords
side-chain engineering; donor-acceptor conjugated small molecules; hole-transport materials; dopant-free; perovskite solar cells
Funding
- National Natural Science Foundation of China [61775091, 21805128, 51573076]
- Shenzhen Key Laboratory Project [ZDSYS201602261933302]
- Shenzhen Basic Research Fund [JCYJ20180504165851864, JCYJ20170817105905899]
- Science and Technology Development Fund, Macau SAR [063/2016/A2, 064/2016/A2, 028/2017/A1, 0051/2019/AFJ]
- [SRG2016-00091-FST]
Ask authors/readers for more resources
Simultaneously improving efficiency and stability, which are particularly crucial factors for the commercialization of perovskite solar cells (PSCs), remains a major challenge. For high-efficiency normal PSCs, the development of stable dopant-free hole-transport materials (HTMs) seems imperative. Here, we developed potential donor acceptor small molecules (BTTI) as HTMs for normal planar PSCs. Through tailoring its alkyl side-chain length as BTTI-C6, BTTI-C8, and BTTI-C12, our results show that upon shortening the side chain of BTTI, the hole mobility, film-forming capability, and resultant device performance were remarkably improved, with the device conversion efficiencies of 19.69% for BTTI-C6, 18.89% for BTTI-C8, and 17.49% for BTTI-C12. Meanwhile, compared to those made with the routine doped Spiro-OMeTAD, devices based on our dopant-free HTMs exhibited significantly improved stability. This work paves the way to the development of effective dopant-free HTMs for high-performance PSCs.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available