We downloaded around 30,000 peer-reviewed articles that serve as a metadata. These articles are acquired both from the open access journals such as Nature and other journals such as the American Chemical Society, Elsevier, Royal Society of Chemistry, etc. The articles were queried by simply searching for the phrases -"halide perovskites", "hybrid organic inorganic perovskites", "toxic perovskites", "perovskite solar cells", and "chemical synthesis of perovskites". These articles form the metadata on which we implement contextual NLP to get data for further analysis.