Short-Chain Acid Additives to Control PbI2 Crystallization in Hybrid Perovskite Films

被引：3
|
作者：
Dionigi, Chiara [1 ]
Calabrese, Gabriele [2 ]
Ruani, Giampiero [1 ]
Milita, Silvia [2 ]
机构：
[1] CNR, Ist Studio Mat Nanostrutturati ISMN, Via P Gobetti 101, I-40129 Bologna, Italy
[2] CNR, Ist Microelettron & Microsistemi IMM, Via P Gobetti 101, I-40129 Bologna, Italy
来源：
INORGANICS | 2022年 / 10卷 / 08期
关键词：
perovskite; films; PbI2; crystallization; solar cells; short chain acids; METHYLAMMONIUM LEAD IODIDE; SOLAR-CELLS; GROWTH;
D O I：
10.3390/inorganics10080114
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The quality and the performance of hybrid perovskite (HP)'s films strongly depend on the complete conversion into MAPbI(3) of a spin-coated solution of methylammonium iodide (MAI) and PbI2. Highly crystalline PbI2 on a substrate limits such a conversion and, consequently, the HP's solar cell performances. We investigate for the first time the use of short-chain organic acids as additives in a non-complexing solvent like gamma-butyrolactone (GBL), that can retard retard the crystallization of PbI2. Based on XRD analyses of the spin coated films, the acetic acid is the most effective additive in retarding the PbI2 crystallization, making Pb2+ available for a subsequent reaction with MAI. These results open a new experimental path for fabricating perovskite films by single or sequential step methods involving acid additives.
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页数：9
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