Solvent Effect on Film Formation and Trap States of Two-Dimensional Dion-Jacobson Perovskite

被引：38

作者：

Huang, Gaosheng ^{[1
,2
]}

Chen, Jieyi ^{[3
]}

Wang, Boxin ^{[1
,2
]}

Cheng, Qian ^{[1
,2
]}

Li, Yanxun ^{[1
,2
]}

Zafar, Saud Uz ^{[1
,2
]}

Yue, Tong ^{[4
]}

Yan, Yangjun ^{[1
]}

Du, Wenna ^{[1
]}

Zhang, Hong ^{[1
]}

Liu, Xinfeng ^{[1
]}

Zhang, Yuan ^{[4
]}

Zhou, Huiqiong ^{[1
,2
]}

机构：

[1] Natl Ctr Nanosci & Technol, CAS, Key Lab Nanosyst & Hierarch Fabricat, Beijing 100190, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[3] Tsinghua Univ, Inst Flexible Elect Technol, Jiaxing 314000, Peoples R China

[4] Beihang Univ, Beijing Adv Innovat Ctr Biomed Engn, Sch Chem, Beijing 100191, Peoples R China

来源：

NANO LETTERS | 2022年

基金：

中国国家自然科学基金;

关键词：

solvent effect; retarded nucleation; film formation; trap states; nonradiative recombination; 2D RUDDLESDEN-POPPER; HYBRID; QUANTUM;

D O I：

10.1021/acs.nanolett.2c02533

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Two dimensional Dion-Jacobson (2D DJ) perovskite has emerged as a potential photovoltaic material because of its unique optoelectronic characteristics. However, due to its low structural flexibility and high formation energy, extra assistance is needed during crystallization. Herein, we study the solvent effect on film formation and trap states of 2D DJ perovskite. It is found that the nucleation process of 2D DJ perovskite can be retarded by extra coordination, which is proved by in situ optical spectra. As a benefit, out-of-plane oriented crystallization and ordered phase distribution are realized. Finally, in 1,5-pentanediammonium (PeDA) based 2D DJ perovskite solar cells (PSCs), one of the highest reported open-circuit voltage (V-OC) values of 1.25 V with state-of-the-art efficiency of 18.41% is obtained due to greatly shallowed trap states and suppressed nonradiative recombination. The device also exhibits excellent heat tolerance, which maintains 80% of its initial efficiency after being kept under 85 ? after 3000 h.

引用

页码：7545 / 7553

页数：9

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