Novel Two-Dimensional Graphdiyne-Derived Additive for Stable Inverted Perovskite Solar Cells

Abstract

The defects in perovskite films hinder the improvement of efficiency and long-term device stability of perovskite solar cells (PSCs). Antisolvent additive engineering has been widely applied to effectively reduce perovskite defects and improve the perovskite crystal quality. However, most of the traditional antisolvent-assisted organic additives endure the disadvantages of high volatility, instability, inflammability, high diffusion coefficient, and even toxicity, which hinder the device's stability for PSCs and raise serious environmental concerns. Herein, in this work, a novel two-dimensional tripolyindene hydrogen-substituted graphdiyne, denoted as DES-O-PHsGY, was synthesized through an easily accessible and biocompatible deep eutectic solvent. XPS measurement demonstrated that DES-O-PHsGY can passivate the lead defects in the perovskite layer. XRD and SEM results verified that DES-O-PHsGY can improve perovskite crystallization. After DES-O-PHsGY was applied as an antisolvent additive for MAPbI3based PSCs, the maximum open-circuit voltage of devices was increased from 1.079 V to 1.106 V, accompanied by a maximum power conversion efficiency of 20.51% surpassing that without the additive (19.51%). More importantly, the perovskite film with DES-O-PHsGY modification showed satisfactory thermal stability under an 80 °C continuous heating process. This work provides a novel method to prepare effective additives for perovskite defect passivation.

NiFeP nanosheets for efficient and durable hydrazine-assisted electrolytic hydrogen production

“…27,35,36 Fig. 2d shows the Fe 2p spectrum of NiFeP/NF, 35,37 where 707.5 eV and 712.7 eV can be assigned to Fe-P and Fe-O, respectively. Fig.…”

Highly efficient and durable P, Ru–CeO2 self-supporting electrodes toward industrial-level hydrogen production

“…[31][32][33][34] However, the current densities of most catalysts were generally below 200 mA cm −2 , which is still not comparable to commercial noble metal catalysts and cannot meet the requirements of industrial water electrolysis. [35][36][37] In addition, the long-term stability is another bottleneck issue for practical electrolysers. The majority of the reported electrocatalysts usually work well only at small current densities (<100 mA cm −2 ) and dilute Cl − concentration (0.5 mmol L −1 ) for several hours (<50 h), which cannot meet the industrial requirements of practical electrolyzers.…”

Thermally deposited copper(i) thiocyanate thin film: an efficient and sustainable approach for the hole transport layer in perovskite solar cells

“…10,11 In general, hole transport materials (HTMs) can be categorized into organic and inorganic materials. Compared with organic HTMs [such as 2,2 0 ,7,7 0 -tetrakis[N,N-di(4-methoxyphenyl)amine]-9,9 0 -spirobifluorene (spiro-OMeTAD), 12 (3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS), 13,14 poly[bis(4phenyl)(2,4,6-trimethylphenyl)amine] (PTAA), 15 triphenylamine (TPA), spiro-OMeTAD derivatives and others], [16][17][18][19] inorganic HTMs [such as copper oxides (CuO X ), nickel oxides (NiO X ), 20 copper iodide (CuI), 21,22 copper thiocyanate (CuSCN), [23][24][25][26] and copper selenocyanate (CuSeCN) [27][28][29] ] exhibit excellent chemical stability, high hole mobility, and high optical transparency. 30,31 Moreover, the facile and low-cost preparation of inorganic HTMs has emerged as a cost-effective substitute for organic a Photovoltaic Metrology Section, Advanced Materials & Device Metrology Division, CSIR-National Physical Laboratory, Dr K. S. Krishnan Marg, New Delhi 110012, India.…”