TY - JOUR
T1 - Low Dimensional, Metal-Free, Hydrazinium Halide Perovskite-Related Single Crystals and Their Use as X-Ray Detectors
AU - Song, Xin
AU - Cohen, Hagai
AU - Yin, Jun
AU - Li, Haojin
AU - Wang, Jiayi
AU - Yuan, Youyou
AU - Huang, Renwu
AU - Cui, Qingyue
AU - Ma, Chuang
AU - Liu, Shengzhong
AU - Hodes, Gary
AU - Zhao, Kui
N1 - Funding Information:
This work was supported by the Key Program project of the National Natural Science Foundation of China (51933010), the National Natural Science Foundation of China (61974085), the 111 Project (B21005), the National University Research Fund (GK202201005) and National 1000‐talent‐plan program (1110010341).
Publisher Copyright:
© 2023 Wiley-VCH GmbH.
PY - 2023/7/26
Y1 - 2023/7/26
N2 - Metal-free halide perovskites (MFHaPs) have garnered significant attention in recent years due to their desirable properties, such as low toxicity, light weight, chemical versatility, and potential for optoelectronics. MFHaPs with the formula A2+B+X−3 (where A is a large organic divalent cation, B+ is typically NH4+, and X is a halide) have been studied extensively, but few studies have examined alternative cations at the B position. This paper reports the synthesis of three MFHaP-related single crystals, DABCO-N2H5-X3 (DABCO = N-N-diazabicyclo[2.2.2]octonium, X = Br and I) and (DABCO)3-N2H5(NH4)2Cl9, which feature hydrazinium (N2H5) at the B position. The crystals have a perovskite-like, one-dimensional, edge-connected structure and exhibit optical and band structure properties. The crystals were then tested as X-ray detectors, where they showed excellent photoresponsivity, stability, and low background noise, owing to the large semi-gap that dictates long lifetimes. The detectors exhibited sensitivity as high as 1143 ± 10 µC Gyair−1 cm−2 and a low detection limit of 2.68 µGy s−1 at 10 V. The researchers suggest that the stronger hydrogen bonding in N2H5+ compounds compared to NH4+ MFHaPs may contribute to the detectors’ enhanced stability.
AB - Metal-free halide perovskites (MFHaPs) have garnered significant attention in recent years due to their desirable properties, such as low toxicity, light weight, chemical versatility, and potential for optoelectronics. MFHaPs with the formula A2+B+X−3 (where A is a large organic divalent cation, B+ is typically NH4+, and X is a halide) have been studied extensively, but few studies have examined alternative cations at the B position. This paper reports the synthesis of three MFHaP-related single crystals, DABCO-N2H5-X3 (DABCO = N-N-diazabicyclo[2.2.2]octonium, X = Br and I) and (DABCO)3-N2H5(NH4)2Cl9, which feature hydrazinium (N2H5) at the B position. The crystals have a perovskite-like, one-dimensional, edge-connected structure and exhibit optical and band structure properties. The crystals were then tested as X-ray detectors, where they showed excellent photoresponsivity, stability, and low background noise, owing to the large semi-gap that dictates long lifetimes. The detectors exhibited sensitivity as high as 1143 ± 10 µC Gyair−1 cm−2 and a low detection limit of 2.68 µGy s−1 at 10 V. The researchers suggest that the stronger hydrogen bonding in N2H5+ compounds compared to NH4+ MFHaPs may contribute to the detectors’ enhanced stability.
KW - high voltage detectors
KW - metal-free perovskite
KW - single crystals
KW - X-ray detectors
UR - http://www.scopus.com/inward/record.url?scp=85152038670&partnerID=8YFLogxK
U2 - 10.1002/smll.202300892
DO - 10.1002/smll.202300892
M3 - Article
C2 - 37035944
AN - SCOPUS:85152038670
SN - 1613-6810
VL - 19
JO - Small
JF - Small
IS - 30
M1 - 2300892
ER -