气候变化领域集成服务门户(CCPortal): Tailoring carrier dynamics in perovskite solar cells: Via precise dimension and architecture control and interfacial positioning of plasmonic nanoparticles

CCPortal

DOI	10.1039/c9ee03937f
	Tailoring carrier dynamics in perovskite solar cells: Via precise dimension and architecture control and interfacial positioning of plasmonic nanoparticles
	Cui X.; Cui X.; Chen Y.; Zhang M.; Harn Y.W.; Qi J.; Gao L.; Wang Z.L.; Huang J.; Yang Y.; Lin Z.
发表日期	2020
ISSN	17545692
起始页码	1743
结束页码	1752
卷号	13 期号:6
英文摘要	Placing plasmonic nanoparticles (NPs) in close proximity to semiconductor nanostructures renders effective tuning of the optoelectronic properties of semiconductors through the localized surface plasmon resonance (LSPR)-induced enhancement of light absorption and/or promotion of carrier transport. Herein, we report on, for the first time, the scrutiny of carrier dynamics of perovskite solar cells (PSCs) via sandwiching monodisperse plasmonic/dielectric core/shell NPs with systematically varied dielectric shell thickness yet fixed plasmonic core diameter within an electron transport layer (ETL). Specifically, a set of Au NPs with precisely controlled dimensions (i.e., fixed Au core diameter and tunable SiO2 shell thickness) and architectures (plain Au NPs and plasmonic/dielectric Au/SiO2 core/shell NPs) are first crafted by capitalizing on the star-like block copolymer nanoreactor strategy. Subsequently, these monodisperse NPs are sandwiched between the two consecutive TiO2 ETLs. Intriguingly, there exists a critical dielectric SiO2 shell thickness, below which hot electrons from the Au core are readily injected to TiO2 (i.e., hot electron transfer (HET)); this promotes local electron mobility in the TiO2 ETL, leading to improved charge transport and increased short-circuit current density (Jsc). It is also notable that the HET effect moves up the Fermi level of TiO2, resulting in an enhanced built-in potential and open-circuit voltage (Voc). Taken together, the PSCs constructed by employing a sandwich-like TiO2/Au NPs/TiO2 ETL exhibit both greatly enhanced Jsc and Voc, delivering champion PCEs of 18.81% and 19.42% in planar and mesostructured PSCs, respectively. As such, the judicious positioning of rationally designed monodisperse plasmonic NPs in the ETL affords effective tailoring of carrier dynamics, thereby providing a unique platform for developing high-performance PSCs. © The Royal Society of Chemistry.
英文关键词	Block copolymers; Carrier transport; Computer architecture; Dynamics; Electron transport properties; Gold; High-k dielectric; Hot electrons; Light absorption; Low-k dielectric; Open circuit voltage; Perovskite; Perovskite solar cells; Plasmons; Silica; Silicon; Silicon solar cells; Surface plasmon resonance; Titanium dioxide; Built-in potential; Carrier dynamics; Dielectric shells; Electron transport layers; Hot electron transfer; Localized surface plasmon resonance; Optoelectronic properties; Semiconductor nanostructures; Plasmonic nanoparticles
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/189651
作者单位	School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, United States; Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education, Hubei Key Laboratory of Catalysis and Materials Science, South-Central University for Nationalities, Wuhan, 430074, China; Department of Applied Physical Sciences, University of North Carolina, Chapel Hill, NC 27599, United States
推荐引用方式 GB/T 7714	Cui X.,Cui X.,Chen Y.,et al. Tailoring carrier dynamics in perovskite solar cells: Via precise dimension and architecture control and interfacial positioning of plasmonic nanoparticles[J],2020,13(6).
APA	Cui X..,Cui X..,Chen Y..,Zhang M..,Harn Y.W..,...&Lin Z..(2020).Tailoring carrier dynamics in perovskite solar cells: Via precise dimension and architecture control and interfacial positioning of plasmonic nanoparticles.Energy & Environmental Science,13(6).
MLA	Cui X.,et al."Tailoring carrier dynamics in perovskite solar cells: Via precise dimension and architecture control and interfacial positioning of plasmonic nanoparticles".Energy & Environmental Science 13.6(2020).