In situ nucleophilic substitutional growth of methylammonium lead iodide polycrystals.
- Argonne National Lab. (ANL), Argonne, IL (United States). Center for Nanoscale Materials and Nanoscience and Technology Division
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Dept. of Organic Materials Science
- Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS) and X-ray Science Division
- Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
- Argonne National Lab. (ANL), Argonne, IL (United States). Center for Nanoscale Materials and Nanoscience and Technology Division; Univ. of Chicago, IL (United States). Inst. for Molecular Engineering
Methylammonium lead iodide (MAPbIx) perovskites are organic-inorganic semiconductors that serve as the light-harvesting component of the photovoltaics, and are desirable with their long diffusion length yielding power conversion efficiencies of ≥22%. Conventional techniques grow perovskites by spin coating precursors on an oxide or a polymer substrate followed by annealing, however, use of high boiling point solvents and high temperatures hinder device stability and performance. Through a one-step, acid-catalyzed nucleophilic-substitutional crystal growth in polar protic solvents, we show evidence for the substrate- and annealing- free production of MAPbIx polycrystals that are metallic-lead-free with negligibly small amount of PbI2 precipitation (<10%). On the basis of this chemical composition, we have devised an in situ growth of highly air (upto ~1.5 months) and thermally-stable (≤300°C), tetragonal-phased, variable-sized polycrystals (~100 nm-10 μm) amendable for large-area deposition, and ultimately, large-scale manufacturing. This method is encouraging for stable optoelectronic devices, and leads to energy-efficient and low-cost processing.
- Research Organization:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; USDOE National Nuclear Security Administration (NNSA)
- DOE Contract Number:
- AC04-94AL85000; AC02-06CH11357
- OSTI ID:
- 1429616
- Report Number(s):
- SAND2017-0626J; 650589
- Journal Information:
- Nature Chemistry, Journal Name: Nature Chemistry
- Country of Publication:
- United States
- Language:
- English
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