@article{Li2026, 
author = {Yaoguang Li and Yiwen Ren and Wenbin Shi and Zheng Chen and Xiaotao Zhang and Fangxu Yang and Liqiang Li and Wenping Hu and Lingjie Sun},
title = {Near‐Room‐Temperature Solution Epitaxy of Large‐Area High‐Mobility Two‐Dimensional Organic Single Crystals for Direct X‐Ray Detection},
year = {2026},
journal = {SmartMat},
volume = {7},
number = {3},
pages = {e70084},
keywords = {high mobility, organic single crystals, solution epitaxy methods, X‐ray detectors},
url = {https://www.sciopen.com/article/10.1002/smm2.70084},
doi = {10.1002/smm2.70084},
abstract = {The fundamental trade‐off between high intrinsic carrier mobility and solution processability severely limits the development of organic single crystals (OSCs). For instance, while 2,6‐diphenylanthracene (DPA) is a benchmark candidate for direct X‐ray detection, its intrinsic insolubility hinders solution processing, and conventional solubilizing alkyl modifications inevitably degrade transport efficiency. Here, we report a facile surfactant‐assisted near‐room‐temperature solution epitaxy method to overcome this bottleneck, fabricating centimeter‐scale ultrathin DPA two‐dimensional (2D) OSCs utilizing a common solvent at 35℃. Electrical characterization reveals that the as‐fabricated DPA 2DOSCs exhibit a maximum mobility of 5.55 cm2/(V ∙ s), an order of magnitude higher than that of the alkylated C6‐DPA counterpart. This superior charge transport efficiency directly translates into exceptional X‐ray detection performance, achieving a high sensitivity of 7.02 × 103 μC/(Gy∙cm2) and a low detection limit of 24.05 nGy/s. This work not only provides a facile low‐energy route to process intrinsically insoluble organic semiconductors but also establishes high‐mobility DPA 2DOSCs as a premier platform for next‐generation large‐area organic direct X‐ray detectors.}
}