In situ laser generation of NiO nanoparticles embedded in graphene flakes for ambient-processed hole-transport-layer-free perovskite solar cells
In situ laser generation of NiO nanoparticles embedded in graphene flakes for ambient-processed hole-transport-layer-free perovskite solar cells
复制标题
DOI：
10.1016/j.carbon.2023.118360
复制
发表时间：
2023-08
期刊：
影响因子：
10.9
通讯作者：
Dong Wang;Qian Chen;Hongbo Mo;Dongxu Cheng;Xuzhao Liu;Wen Liu;J. Jacobs;A. Thomas;
中科院分区：
文献类型：
--
作者：
Dong Wang;Qian Chen;Hongbo Mo;Dongxu Cheng;Xuzhao Liu;Wen Liu;J. Jacobs;A. Thomas;
碳基无空穴传输层钙钛矿太阳能电池（HTL-free C-PSC）由于其低成本、易于制造、低温可加工性和优异的长期稳定性而获得了极大的关注。然而，不含HTL的C-PSC在碳/钙钛矿处的界面接触差，并且空穴提取能力有限，从而限制了器件的性能。本文提出了一种原位一步合成的方法，制备了嵌有均匀分布的细NiO纳米颗粒的激光诱导石墨烯薄片（LIG@NiOX），作为无HTL的C-PSC的电极。由于LIG薄片的所需形态，其使得能够在没有后热处理或热压工艺的情况下形成紧凑的LIG@ NiO电极。因此，在约50-70%的高相对湿度下基于LIG@ NiO制备的完全环境处理的无HTL的C-PSC实现了高达14.46%的功率转换效率（PCE），相比之下基于商业石墨/炭黑的PSC的PCE为10.36%。这是由于使用LIG@NiOX在碳/钙钛矿界面处的物理接触的显著改善。此外，基于LIG@ NiO的PSC在环境空气中储存185天后保留了其初始PCE的94%，相比之下，基于螺环-OMeCl/Au的PSC在相同环境条件下储存84天后仅保留了其初始PCE的78%。激光工艺为同时形成嵌入原位形成的金属氧化物纳米颗粒的LIG开辟了新的途径，用于各种应用。
Carbon-based hole-transport-layer-free perovskite solar cells (HTL-free C–PSCs) have gained tremendous attention due to their low cost, ease of fabrication, low-temperature processability, and excellent long-term stability. However, HTL-free C–PSCs suffer from poor interfacial contact at the carbon/perovskite and limited hole extraction ability, thereby limiting the device's performance. Herein, anin situone-step synthesis strategy is presented to simultaneously generate laser-induced graphene flakes (LIG) embedded with the uniformly distributed fine NiOXnanoparticles (LIG@NiOX) as the electrode for HTL-free C–PSCs. Due to the desired morphology of the LIG flakes, it enables the formation of a compact LIG@NiOXelectrode without a post-heat treatment or hot-pressing process. As a result, the fully ambient-processed HTL-free C–PSCs prepared under a high relative humidity of around 50–70% based on the LIG@NiOXachieve a power conversion efficiency (PCE) of up to 14.46%, compared to a PCE of 10.36% for the PSCs based on the commercial graphite/carbon black. This is due to a remarkable improvement in the physical contact at the carbon/perovskite interface using LIG@NiOX. Moreover, the PSCs based on LIG@NiOXretained 94% of their initial PCEs after 185 days of storage in ambient air, compared to those based on the Spiro-OMeTAD/Au that only retained 78% of their initial PCEs after 84 days of storage under the same ambient condition. The laser process opens a new avenue for simultaneous forming LIG embedded with thein situformed metal oxide nanoparticles for various applications.