Interest in sustainable consumption has increased in recent years, and researchers have turned their attention to understanding green customers through the domain of consumer psychology. This study examines how psychological factors influence environmentally responsible purchasing behaviour, with specific reference to product quality, reliability, and maintenance. A bibliometric analysis of published research drawn from major academic databases was conducted to map developments in the field and identify prevailing trends. The results indicate that customers’ perceptions of product quality, durability, and long‑term performance strongly influence their willingness to purchase sustainable goods. Consumers tend to favour green products when they are viewed as dependable and able to meet ongoing needs. Considerations related to product maintenance and lifespan also emerge as important, affecting satisfaction and continued use. Alongside these functional attributes, environmental values and confidence in sustainability claims remain central drivers of purchasing choices. The review highlights a growing body of work yet reveals limited integration between psychological studies of green consumption and research focused on quality and reliability. By bringing these areas together, this paper identifies gaps that warrant further investigation. The insights may support organisations seeking to design and manage sustainable products that align with customer expectations and long‑term performance outcomes.

Keywords

Green customers, Bibliometric analysis, Quality, Reliability, Sustainability