Metal halide perovskites (MHPs) are promising candidate materials for next-generation optoelectronic device applications such as light-emitting diodes (LEDs), solar cells, and photodetectors. However, the toxicity and poor stability issues of lead-based MHPs (LHPs) are still challenging to fulfill a restriction of hazardous substances directive (RoHS) and industrial standards for the commercialization of LHP devices. Therefore, eco-friendly and lead-free halide perovskites (EHPs), which are superior to LHPs, should be developed. In this review, we will review the promising strategies to substitute a lead cation with non-toxic metal cations such as tin (Sn), bismuth (Bi), antimony (Sb), and copper (Cu), and discuss the synthetic methods, crystal structures, luminescent properties, and their LED applications.
1. 서론
2. 등가 원소에 의한 Pb 대체 방법 (homovalent substitution)
3. 이가 원소에 의한 Pb 대체 방법 (heterovalent substitution)
결론
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