Journal
ENERGY & ENVIRONMENTAL SCIENCE
Volume 9, Issue 1, Pages 12-30Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ee02194d
Keywords
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Funding
- Center for Advanced Soft-Electronics - Ministry of Science, ICT and Future Planning as Global Frontier Project [CASE-2014M3A6A5060947]
- POSCO
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Organometal halide perovskites are promising photo-absorption materials in solar cells due to their high extinction coefficient, broad light absorption range and excellent semiconducting properties. The highest power conversion efficiency (PCE) of perovskite solar cells (PrSCs) is now 20.1%. However, a high-temperature processed mesoscopic metal oxide (e.g., TiO2) must be removed to realize flexible PrSCs on plastic substrates using low temperature processes. Although the planar heterojunction (PHJ) structure can be considered as the most appropriate structure for flexible PrSCs, they have shown lower PCEs than those with a mesoscopic metal oxide layer. Therefore, development of interfacial layers is essential for achieving highly efficient PHJ PrSCs, and necessary in fabrication of flexible PrSCs. This review article gives an overview of progress in PHJ PrSCs and the roles of interfacial layers in the device, and suggests a practical strategy to fabricate highly efficient and flexible PHJ PrSCs. We conclude with our technical suggestion and outlook for further research direction.
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