4.8 Review

Promotion Strategies of Hole Transport Materials by Electronic and Steric Controls for n-i-p Perovskite Solar Cells

Journal

CHEMSUSCHEM
Volume 15, Issue 14, Pages -

Publisher

WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.202200340

Keywords

electronic modification; energy conversion; hole transport materials; perovskite solar cells; promotion strategies

Funding

  1. National Natural Science Foundation of China [22075238, 21805232, 21721001]
  2. Natural Science Foundation of Jiangxi Province of China [20192ACBL20047]
  3. Science and Technology Projects of Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province [RD 2020020101]

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This review summarizes the design strategies of common HTMs for n-i-p perovskite solar cells, discussing them comprehensively from the perspectives of additive and non-additive engineering. Critical analysis and comparison between these design strategies are provided, considering the overall power conversion efficiencies and stabilities of the solar cells. The review also provides a brief perspective on future promising design strategies for HTMs to achieve commercialization of the solar cells.
Hole transport materials (HTMs) play a requisite role in n-i-p perovskite solar cells (PSCs). The properties of HTMs, such as hole extraction efficiency, chemical compatibility, film morphology, ion migration barrier, and so on, significantly affect PSCs' power conversion efficiencies (PCEs) and stabilities. Up till now, researchers have devoted much attention to developing new types of HTMs as well as promoting pristine HTMs using numerous strategies. In this Review, we summarize the design strategies of various common HTMs for n-i-p PSCs are comprehensively discussed from two separate aspects (additive and non-additive engineering). Additive engineering generally tunes electronic properties of HTMs while non-additive engineering basically modifies their steric structures. Critical analysis and comparison between these design strategies are provided, considering the overall PCEs and stabilities of PSCs. Finally, a brief perspective on future promising design strategies for HTMs is given, in order to fabricate efficient and stable n-i-p devices for the commercialization of PSCs.

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