Abstract
Hybrid halide perovskites have become one of the leading materials in the new generation photovoltaics. While their performances are rapidly increasing, the stability under operating conditions remains a limiting factor to their application. There is an ongoing effort to overcome the performance and stability limitations by designing new perovskite materials as well as modifying their structure through various molecular modulators that affect their crystal structure, defect chemistry, and optoelectronic properties. It is desirable to control the properties of materials and devices without compromising their stabilities, and host-guest complexation has recently provided a powerful strategy to achieve that goal. This article provides an overview of the host-guest complexation strategies and their utility in hybrid perovskite optoelectronics, along with the emerging perspectives for future applications.
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