摘要：The optoelectronic properties of atomically thin transition metal dichalcogenides(TMDs)are largely influenced by defect populations(DPs).In this work,we fabricate WSmonolayers with different DPs by varying the fabrication methods and further reveal their distinct exciton-exciton ***-state photoluminescence(PL)experiments show that the monolayer with the lowest DP shows optimal PL intensity at low excitation power;however,it is overtaken and significantly surpassed by monolayers with higher DPs at high excitation ***-power-dependent experiments demonstrate that these monolayers exhibit distinct PL saturation behaviors with the threshold power differing by four orders of *** with in situ PL imaging and time-resolved PL experiments,we attribute such PL evolution discrepancies to the different DPs within these monolayers,which largely influence the exciton diffusion behavior and subsequently bring about distinct nonradiative exciton-exciton annihilations(EEAs).Valley polarization experiments are further employed to re-examine the DPs of these *** work reveals the distinct PL behaviors and underlying exciton dynamics in TMD monolayers with different DPs,which can largely facilitate the engineering of relevant high-performance devices for practical applications.

摘要：传统村落是在一定的区域自然环境、历史、文化地域背景下演变而形成的,其承载着鲜活的生产智慧、民族特色、地域特征等丰富的历史文化信息,是宝贵的活态文化遗产,也是中华民族文化的根基。我国传统村落量大面广,亟需建立整体性保护发展理念。社会有机体是探讨社会各环节运行发展规律的重要理论支撑,文章以社会有机体理论为视角,提出传统村落集群保护发展方法,探索县域范围内多个传统村落的系统性、协同性保护发展框架和路径,并以河北省石家庄市井陉县为例,从整体保护、资源整合、激活内生动力形成村落品牌文化群等方面为县域传统村落集群保护发展提供参考。

摘要：传统村落是我国农耕文明的鲜活遗产,蕴含深厚的历史信息和多样的文化景观。面对目前6819个数量众多的传统村落,如何避免零碎化保护、格式化发展,是当前紧迫的问题。利用ArcGIS10.2在对中国传统村落空间特征解析的基础上,引入以区域统筹为统领的传统村落保护利用理念,针对传统村落集群分布的地区,提出资源要素的整合与融合,进行“文化遗产整体保护”“基础设施与公共服务设施共建共享”“产业协作集群发展”“改善提升人居环境”的保护利用路径探索。以渭南市传统村落为例,在区域统筹视角下,探索区域传统村落保护利用方法和路径,为传统村落的有效保护、合理利用提供借鉴。