PEROPTO · Single Crystalline Halide Metal Perovskites Based Optoelectronics
Horizon 2020 — Marie Skłodowska-Curie Actions
- Duration
- 2018-02-01 → 2020-07-05
- EU contribution
- €195,455
- Participants
- 1
- Scheme
- MSCA-IF
Lines connect the coordinator with its partners.
Results in brief
Single Crystalline Halide Metal Perovskites Based Optoelectronics
The emerging methylammonium lead halide perovskite are the ideal materials of specific interest for diverse optoelectronic applications, for instance, photovoltaic, light emitting diode (LED), laser and photodetector, etc. Especially in the field of photovoltaics, the photo-to-electron conversion efficiency of perovskite solar cells (PSCs) has rapidly risen from 3.8% to 22.1% within a few years. According to the literature, the nature of polycrystalline perovskite films as the main absorbing layer of PSCs intrinsically impedes further improvement of cell performance due to the fact that tremendous amount of grain boundaries and defects existing within polycrystalline perovskite films serves as recombination center and thus hinders efficient diffusion of charge carriers, which confines diffusion length of charge carriers within only few micrometers. Therefore, breakthrough improvement of its efficiency will rely decisively on the finest control or minimize grain boundaries and trap densities of perovskite materials, which eventually could be single crystalline perovskite materials. Among various morphologies of perovskite single crystals, ultrathin large scale perovskite platelets, which have the shape with much-extended dimension up to centimeters scale along x, y-direction but confined dimension down to less than 1 µm in z-direction, possess the practical potential for fabricating high-performance optoelectronic devices. This proposal will tackle with the synthetic challenges of single crystalline perovskite materials with controllable dimension and its integration with optoelectronic devices such as solar cell, LED and laser for potential breakthrough of device performance. This envisioned combined approach, as far as we know, is herein explored for the first time. In this project, we are planned firstly tackle with synthetic obstacles obtaining those single crystals with tailored dimension, especially ultrathin large scale perovskite platelets, by either chemical solution process which takes advantage of template formed by specific metal oxide frame or functional surfactants, or spatial atmospheric atomic layer deposition process which requires an epitaxial growth by feeding specific precursor vapor of perovskite raw materials. With those materials in hand, various optoelectronic devices, especially solar cell as the initial attempt, will be constructed based on those synthesized large scale single-crystalline perovskite materials for a potential breakthrough of device performance, and characterized with advanced optical and electronic tools and techniques to correlate device performance with the nature of single crystalline perovskite materials.
Data: CORDIS, © European Union
Project objective
The emerging methylammonium lead halide perovskites are near-ideal semiconducting materials. They can be easily formed in to thin semiconducting films, suitable for use in a wide range of optoelectronic devices including solar cells and light emitting diodes, giving them huge potential to replace existing semiconductors in these roles. However, the films normally used in those devices are polycrystalline, containing a high density of grain boundaries and defects which intrinsically limits the performance of these otherwise exceptional materials. The ultimate goal of this fellowship is to integrate ultrathin large scale perovskite single crystal into optoelectronic devices for the first time, leading to a step change in device performance, comparable to that realized when single-crystal silicon was first achieved. This development will be underpinned by a detailed experimental investigation to determine the impact of single-crystal preparation on the electronic and spectroscopic properties of perovskite film, particularly exploring charge carrier diffusion in a material with low defect density and minimal grain-boundaries. Ultimately, we will establish whether a cheap, printable material can achieve optoelectronic devices at the thermodynamic limit – a goal of the community for the last quarter century. This project will tackle first the synthetic challenges of producing single crystalline perovskite materials with controllable dimensions, and subsequently their integration into optoelectronic devices. This proposal takes advantage of the unique opportunity afforded by the skills of the applicant in the synthesis of controlled dimensional single crystalline perovskite materials and the fabrication of optoelectronic devices, with the world-class materials and spectroscopic characterization expertise at the Cavendish Laboratory. The success of this proposal will place Europe at the forefront of research in the disruptive and dynamic field of perovskite optoelectronics.
Original text from CORDIS.
Participants
- THE CHANCELLOR MASTERS AND SCHOLARS OF THE UNIVERSITY OF CAMBRIDGE · CAMBRIDGECoordinatorUnited Kingdom
Links
Data: CORDIS, © European Union