PEDOT: PSS) has several shortcomings, such as an easily corroded indium-tin-oxide (ITO) interface at elevated temperatures and induced electrical inhomogeneity. Herein, we propose solution-processed nitrogen-doped graphene oxide nanoribbons (NGONRs) as a hole transport layer (HTL) in perovskite solar cells, replacing the conducting polymer
PEDOT: PSS. The conversion efficiency of NGONR-based perovskite solar cells has outperformed a control device constructed using
PEDOT: PSS. Moreover, our proposed NGONR-based devices also demonstrate a negligible current hysteresis along with improved stability. This work provides an effective route for substituting
PEDOT: PSS as the effective HTL.
Methods: A 69-year-old lady presented with obstructive jaundice, abdominal discomfort and associated constitutional symptoms. She was investigated and found to have obstructive jaundice with normal tumor marker assays. An endoscopic ultrasound was done followed by a needle biopsy which confirmed a pancreatic head angiosarcoma followed by an ERCP and a stent placement. A CT abdomen done revealed a pancreatic head and uncinate tumor with a stent in the common bile duct.
Results: Patient underwent a pylorus preserving pancreaticoduodenectomy with an uneventful post-operative recovery. She defaulted her oncology appointments and was followed up with serial imaging. She developed a local recurrence 18 months after surgery and succumbed to her disease after 3 years.
Conclusions: Pancreatic angiosarcoma is an aggressive tumor compared to other pancreatic malignancies. For a definite diagnosis of angiosarcoma, histopathologic and immunohistochemical analysis are necessary. Surgical resection offers the only possible cure, while oncological treatment has variable outcome. Currently, there are no treatment protocols available due to the small number of cases present in literature.