Acquisition of a Photoluminescence Micro-Spectrometer
Abstract
Dr. Joseph Parker, Office of Naval Research, Code 331Abstract is publicly releasable. Organic-inorganic halide perovskites (OIHPs) a,re a family of materials with unprecedented optical, electronic, and defect-tolerance properties, and they are at the heart of perov,skite solar cells (PSCs) a heavily researched new thin-film photovoltaic (PV) technology. The promise of low-cost, solution-proces,sed PSCs with high efficiencies is driving the PSCs effort worldwide. Grain boundaries (GBs) are ubiquitous in polycrystalline OIHPt,hin films used in PSCs. GBs are also known to play an important role in determining certain critical properties and phenomena in OIH,Ps, which can profoundly influence the performance and stability of the resulting PSCs. Interfaces are also ubiquitous in PSCs, the, ones between OIHP and electron transport layer (ETL) and hole transport layer (HTL). They also control the performance and stabilit,y of PSCs. In the context of PSCs, photoluminescence (PL) is perhaps the most powerful characterization tool to study bulk OIHPs, GB,s, and interfaces.It is proposed to acquire a photoluminescence micro-spectrometer (PLMS) that can comprehensively characterize OIHP,s, GBs, and interfaces for their optical and opto-electronic properties. The proposed PLMS is capable of performing the three necess,ary functions. First, is steady-state PL to measure fundamental materials properties of OIHPs, such as bandgap values, and concentra,tions of impurities and defects. Second is time-resolved PL (TRPL), which is a measure of the time evolution of the PL process in a, given sample, which will be used to characterize the OIHP/ETL and OIHP/HTL interfaces. Third is PL microscopic mapping, which will, allow us to gain spatially-resolved PL information of OIHPs, GBS, and interfaces. Day-today access to the PLMS will allow us to per,form essential characterization experiments pertaining to the current Office of Naval Research (ONR) project (N00014-20-1-2574) Gra,in-Boundary Phenomenain Halide-Perovskite Thin Films and Solar Cells, monitored by Dr. Joseph Parker (Code 331). Other federally-fu,nded research projects on OIHPs and solar cells will also benefit from the acquisition of this PLMS system. While the proposed PLMS, system will enable key research on OIHPs and PSCs, it will be a very valuable tool for the education and training of students and p,ostdoctoral researchers. These activities include routine training, super-user training, and incorporation of PLMS into a course.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jul 13, 2022
- Source ID
- N000142212473
Entities
People
- Nitin P Padture
Organizations
- Brown University
- Office of Naval Research
- United States Navy