Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 10, Issue 14, Pages 11699-11707Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b00495
Keywords
lead-free; copper; halides; perovskite solar cells; optical properties
Funding
- Science & Technology Development Fund in Egypt (STDF) [25250]
- CMRDI, Egypt [25250]
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Toxicity and chemical instability issues of halide perovskites based on organic-inorganic lead-containing materials still remain as the main drawbacks for perovskite solar cells (PSCs). Herein, we discuss the preparation of copper (Cu)-based hybrid materials, where we replace lead (Pb) with nontoxic Cu metal for lead-free PSCs, and investigate their potential toward solar cell applications based on experimental and theoretical studies. The formation of (CH3NH3)(2)CuX4 [(CH3NH3)(2)CuCl4, (CH3NH3)(2)CuCl2I2, and (CH3NH3)(2)CuCl2Br2] was discussed in details. Furthermore, it was found that chlorine (Cl-) in the structure is critical for the stabilization of the formed compounds. Cu-based perovskite-like materials showed attractive absorbance features extended to the near-infrared range, with appropriate band gaps. Green photoluminescence of these materials was obtained because of Cu+ ions. The power conversion efficiency was measured experimentally and estimated theoretically for different architectures of solar cell devices.
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