journal article·2022-11-11

Addressing the Voltage Induced Instability Problem of Perovskite Semiconductor Detectors

Hsinhan Tsai, Dibyajyoti Ghosh, Wyatt Panaccione, Li-Yun Su, Cheng-Hung Hou, Leeyih Wang, Lei Raymond Cao, Sergei Tretiak, Wanyi Nie

ACS Energy Letters· Volume 7· Issue 11
Publisher page

Abstract

Perovskite-based solid-state radiation detectors have delivered impressive performances, but the electrical field induced instability has been a major detriment for the further development. Here, we identify the voltage-induced instability is directly tied to the humidity levels. A higher humidity elicits a hysteresis in the current–voltage curve and lowers the breakdown voltage. We further add a fluorinated phenylethylamine iodide (5F-PEAI) barrier layer on the perovskite, which protects the device against voltage damage. Photoluminescence maps identify the ion migration and degradation can be suppressed by 5F-PEAI. Quantum chemical simulations corroborate experimental results by revealing high energy barrier for water penetrating the 5F-PEAI layer with enhancing stability of halide perovskite under humid condition. Using a treated device, we demonstrate high X-ray sensitivities approaching 1000 μC/(Gyair·cm2) under high biases. Our work provides a mechanistic understanding on the voltage instability of 2D perovskite detectors and provides a viable solution toward robust detector development.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Perovskite Materials and Applications · Ga2O3 and related materials · Luminescence Properties of Advanced Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States

Department of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States

Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States

Department of Materials Science and Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India

Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India

Nuclear Engineering Program, Department of Mechanical and Aerospace Engineering, The Ohio State University, Columbus, Ohio 43210, United States

Center for Condensed Matter Sciences, National Taiwan University. No. 1, Sec. 4, Roosevelt Rd., Taipei 10617, Taiwan

Funding

Los Alamos National Laboratory · Basic Energy Sciences · Defense Threat Reduction Agency

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