OPTOHYB · Perovskite/GaAs hybrid structures: towards enhanced optoelectronic properties
„Хоризонт 2020“ — Действия „Мария Склодовска-Кюри“
- Период
- 2021-11-01 → 2023-10-31
- Финансиране от ЕС
- 171 473 €
- Участници
- 2
- Схема
- MSCA-IF
Линиите свързват координатора с партньорите.
Накратко на български
Хибридни структури от перовскити и галиево-арсенид се анализират, за да се разбере как се движат зарядните носители в тях. Това помага за създаването на по-евтини и чувствителни фотодетектори и слънчеви клетки, които улавят по-голяма част от слънчевия спектър.
Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.
Резултати накратко
Perovskite/GaAs hybrid structures: towards enhanced optoelectronic properties
OPTOHYB aims to develop and analyze a novel hybrid structure combining III-V materials, specifically commercial GaAs, with halide perovskites (ABX3). The initiative seeks to understand the disorder that creates the carrier localization phenomenon in-depth, with the goal of advancing low-cost and efficient photodetection solutions based on the analysis of ABX3/GaAs hybrid junction and ABX3 conventional structures. Given the global demand for affordable and high-performance devices, OPTOHYB represents a significant stride in harnessing sunlight for eco-friendly, sensitive photodetectors, and solar cells that can detect a broad range of the solar spectrum. This hybrid structure is envisioned as a pivotal active layer in emerging photodetector designs. To achieve this, the project's objectives include refining the fabrication process for the hybrid structure by innovatively depositing perovskite polycrystalline films on GaAs, distinguishing it from conventional samples (on glass and/or single crystals). Comprehensive characterization of the fabricated samples is undertaken to understand the factors contributing to carrier localization phenomena generated by the disorder. This investigation facilitates insights into the spatial, temporal, and efficiency aspects of energy and charge transfer mechanisms. Emphasis is placed on bandgap determination, interfacial energy-level alignment optimization, and both experimental and theoretical analyses of carrier localization phenomena. Concurrently, OPTOHYB is committed to evaluating the performance of the newly developed photodetector prototype through foundational characterization processes.
Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз
Цел на проекта
OPTOHYB focuses on studying the carrier localization (CL) in a new hybrid structure namely halide perovskites/GaAs for photodetection application. Understanding the CL phenomenon in this hybrid structure could provide insights towards enhancing/controlling the optoelectronic properties. The idea consists of detecting and controlling the CL in the hybrid heterojunction and orient it towards photodetection devices. The phenomenon can be generated, either, randomly by strain, composition, size, and diffusion fluctuations, or, controllably by doping. The CL affects the bandgap (creating band-tails states and optical transitions) which affects the carrier lifetime. The experimental treatment of the phenomenon will be performed optically by the mean of steady-state photoluminescence (PL) and the time-resolved photoluminescence (TRPL) to evaluate the CL signatures. The obtained results will be correlated with morphological and structural observations to qualitatively understand the luminescence mechanisms in the new hybrid structure. To realize OPTOHYB's goal, for the first time, a quantitative study by modeling the PL features and the decay time will be performed using the Localized State Ensemble model (LSE) and the generalized model for TRPL. The newly obtained parameters will allow the control of the CL's evolution versus the ex- and/or in-situ conditions. The successful execution of this proposal will create a new platform with controllable band-tail state formation and carriers dynamic related to the CL phenomenon. Therefore, slowing the charge carrier lifetime due to the carrier hopping between different states in the band-tail, which is beneficial for photodetection. Finally, the fabrication of a photodetector based on halide perovskites/GaAs heterostructure prototype will be performed. The efficiency of the prototype will be checked regarding the possible engineering of the CL and its effect on the prototype and the way on how we can exploit it.
Оригинален текст от CORDIS (на английски).
Участници
Връзки
Данни: CORDIS, © Европейски съюз