Journal
ADVANCED MATERIALS INTERFACES
Volume 5, Issue 22, Pages -Publisher
WILEY
DOI: 10.1002/admi.201800882
Keywords
inorganic materials; interfacial carrier dynamics; interfacial chemistry; perovskite solar cells; p-type semiconductors
Funding
- Ministry of Science and Technology [MOST 106-2119-M-006-017, MOST 106-2811-M-006-046, MOST 106-2119-M-006-027, MOST 106-2119-M-006-004]
- Hierarchical Green-Energy Materials (Hi-GEM) Research Center, from The Featured Areas Research Center Program by the Ministry of Education (MOE) in Taiwan
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This review presents various hole transport layers (HTLs) employed in perovskite solar cells (PSCs) in pursuing high power conversion efficiency (PCE) and functional stability. The PSCs have achieved high PCE (over 23%, certified by NREL) and more efforts have been devoted into research for stability enhancement. Inorganic HTLs become a popular choice as selective contact materials because of their intrinsic chemical stability and low cost. HTLs and electron transport layers (ETLs) are critical components of PSCs due to the requirement to create charge collection selectivity. Herein the authors provide an overview on inorganic HTLs synthesis, properties, and their application in various PSCs for both mesoporous and planar architectures. Inorganic HTLs with appropriate properties, such as proper energy level and high carrier mobility, can not only assist with charge transport, but also improve the stability of PSCs under ambient conditions. The importance of interfacial chemistry and interfacial charge transport is further addressed to understand the underlying mechanism of related degradation and carrier dynamic. It is expected that the success of the inorganic HTL in PSCs can stimulate further research and bring real impact for future photovoltaic technologies.
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