A sensitive and robust thin-film x-ray detector using 2D layered perovskite diodes

Hsinhan Tsai, Fangze Liu, Shreetu Shrestha, Kasun Fernando, Sergei Tretiak, Brian Scott, Duc Ta Vo, Joseph Strzalka, Wanyi Nie

Research output: Contribution to journalArticlepeer-review

81 Citations (Scopus)

Abstract

Solid-state radiation detectors, using crystalline semiconductors to convert radiation photons to electrical charges, outperform other technologies with high detectivity and sensitivity. Here, we demonstrate a thin-film x-ray detector comprised with highly crystalline two-dimensional Ruddlesden-Popper phase layered perovskites fabricated in a fully depleted p-i-n architecture. It shows high diode resistivity of 1012 ohm·cm in reverse-bias regime leading to a high x-ray detecting sensitivity up to 0.276 C Gyair −1 cm−3. Such high signal is collected by the built-in potential underpinning operation of primary photocurrent device with robust operation. The detectors generate substantial x-ray photon-induced open-circuit voltages that offer an alternative detecting mechanism. Our findings suggest a new generation of x-ray detectors based on low-cost layered perovskite thin films for future x-ray imaging technologies.

Original languageEnglish
Article numbereaay0815
JournalScience Advances
Volume6
Issue number15
DOIs
Publication statusPublished - 2020
Externally publishedYes

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